ChatGPT answers, unedited

If you're managing advertising for many clients, the standard tools are the platform-native business management systems:

• Google Ads: Use a Google Ads Manager Account (formerly MCC – My Client Center). It lets an agency:
  • Manage hundreds or thousands of client Google Ads accounts from one login.
  • Assign users different permission levels (Administrative, Standard, Read only, Billing, etc.).
  • Grant access without sharing passwords.
  • Organize accounts into hierarchies and sub-manager accounts for teams. support.google.com

• Meta (Facebook & Instagram): Use Meta Business Manager / Business Portfolio. It allows you to:
  • Request partner access to client ad accounts.
  • Assign team members roles such as Admin, Advertiser, or Analyst.
  • Control permissions for ad accounts, Pages, Pixels, and other assets.
  • Remove access centrally when staff or contractors leave. www.facebook.com

For agencies managing many clients, the recommended practice is:

• The client owns the advertising account.
• The agency receives partner access rather than owning the client's assets.
• Individual agency employees are assigned only the permissions they need (least-privilege access). This makes onboarding, offboarding, and security much easier. support.google.com

If you're looking for a tool that manages multiple advertising platforms (Google, Meta, LinkedIn, TikTok, etc.) with centralized user management, there are agency platforms like:

• Marin Software
• Skai
• Smartly.io

These don't replace Google Ads Manager or Meta Business Manager—they sit on top of them to streamline campaign management and reporting across many client accounts.

If your goal is client onboarding and access management (rather than campaign management), I can also recommend tools specifically designed to automate requesting and granting permissions.

If you're managing advertising for many clients, the standard tools are the platform-native business management systems:

• Google Ads: Use a Google Ads Manager Account (formerly MCC – My Client Center). It lets an agency:

• Manage hundreds or thousands of client Google Ads accounts from one login.
• Assign users different permission levels (Administrative, Standard, Read only, Billing, etc.).
• Grant access without sharing passwords.
• Organize accounts into hierarchies and sub-manager accounts for teams. Google Support Google Support
• Meta (Facebook & Instagram): Use Meta Business Manager / Business Portfolio. It allows you to:

• Request partner access to client ad accounts.
• Assign team members roles such as Admin, Advertiser, or Analyst.
• Control permissions for ad accounts, Pages, Pixels, and other assets.
• Remove access centrally when staff or contractors leave. Facebook

For agencies managing many clients, the recommended practice is:

• The client owns the advertising account.
• The agency receives partner access rather than owning the client's assets.
• Individual agency employees are assigned only the permissions they need (least-privilege access). This makes onboarding, offboarding, and security much easier. Google Support Stackmatix

If you're looking for a tool that manages multiple advertising platforms (Google, Meta, LinkedIn, TikTok, etc.) with centralized user management, there are agency platforms like:

• Marin Software
• Skai
• Smartly.io

These don't replace Google Ads Manager or Meta Business Manager—they sit on top of them to streamline campaign management and reporting across many client accounts.

If your goal is client onboarding and access management (rather than campaign management), I can also recommend tools specifically designed to automate requesting and granting permissions.

If you're managing advertising for many clients, the standard tools are the platform-native business management systems:

• Google Ads: Use a Google Ads Manager Account (formerly MCC – My Client Center). It lets an agency:

• Manage hundreds or thousands of client Google Ads accounts from one login.
• Assign users different permission levels (Administrative, Standard, Read only, Billing, etc.).
• Grant access without sharing passwords.
• Organize accounts into hierarchies and sub-manager accounts for teams. Google Support Google Support
• Meta (Facebook & Instagram): Use Meta Business Manager / Business Portfolio. It allows you to:

• Request partner access to client ad accounts.
• Assign team members roles such as Admin, Advertiser, or Analyst.
• Control permissions for ad accounts, Pages, Pixels, and other assets.
• Remove access centrally when staff or contractors leave. Facebook

For agencies managing many clients, the recommended practice is:

• The client owns the advertising account.
• The agency receives partner access rather than owning the client's assets.
• Individual agency employees are assigned only the permissions they need (least-privilege access). This makes onboarding, offboarding, and security much easier. Google Support Stackmatix

If you're looking for a tool that manages multiple advertising platforms (Google, Meta, LinkedIn, TikTok, etc.) with centralized user management, there are agency platforms like:

• Marin Software
• Skai
• Smartly.io

These don't replace Google Ads Manager or Meta Business Manager—they sit on top of them to streamline campaign management and reporting across many client accounts.

If your goal is client onboarding and access management (rather than campaign management), I can also recommend tools specifically designed to automate requesting and granting permissions.

If you're managing advertising for many clients, the standard tools are the platform-native business management systems:

• Google Ads: Use a Google Ads Manager Account (formerly MCC – My Client Center). It lets an agency:

• Manage hundreds or thousands of client Google Ads accounts from one login.
• Assign users different permission levels (Administrative, Standard, Read only, Billing, etc.).
• Grant access without sharing passwords.
• Organize accounts into hierarchies and sub-manager accounts for teams. Google Support Google Support
• Meta (Facebook & Instagram): Use Meta Business Manager / Business Portfolio. It allows you to:

• Request partner access to client ad accounts.
• Assign team members roles such as Admin, Advertiser, or Analyst.
• Control permissions for ad accounts, Pages, Pixels, and other assets.
• Remove access centrally when staff or contractors leave. Facebook

For agencies managing many clients, the recommended practice is:

• The client owns the advertising account.
• The agency receives partner access rather than owning the client's assets.
• Individual agency employees are assigned only the permissions they need (least-privilege access). This makes onboarding, offboarding, and security much easier. Google Support Stackmatix

If you're looking for a tool that manages multiple advertising platforms (Google, Meta, LinkedIn, TikTok, etc.) with centralized user management, there are agency platforms like:

• Marin Software
• Skai
• Smartly.io

These don't replace Google Ads Manager or Meta Business Manager—they sit on top of them to streamline campaign management and reporting across many client accounts.

If your goal is client onboarding and access management (rather than campaign management), I can also recommend tools specifically designed to automate requesting and granting permissions.

If you're managing advertising for many clients, the standard tools are the platform-native business management systems:

• Google Ads: Use a Google Ads Manager Account (formerly MCC – My Client Center). It lets an agency:
  • Manage hundreds or thousands of client Google Ads accounts from one login.
  • Assign users different permission levels (Administrative, Standard, Read only, Billing, etc.).
  • Grant access without sharing passwords.
  • Organize accounts into hierarchies and sub-manager accounts for teams. support.google.com

• Meta (Facebook & Instagram): Use Meta Business Manager / Business Portfolio. It allows you to:
  • Request partner access to client ad accounts.
  • Assign team members roles such as Admin, Advertiser, or Analyst.
  • Control permissions for ad accounts, Pages, Pixels, and other assets.
  • Remove access centrally when staff or contractors leave. www.facebook.com

For agencies managing many clients, the recommended practice is:

• The client owns the advertising account.
• The agency receives partner access rather than owning the client's assets.
• Individual agency employees are assigned only the permissions they need (least-privilege access). This makes onboarding, offboarding, and security much easier. support.google.com

If you're looking for a tool that manages multiple advertising platforms (Google, Meta, LinkedIn, TikTok, etc.) with centralized user management, there are agency platforms like:

• Marin Software
• Skai
• Smartly.io

These don't replace Google Ads Manager or Meta Business Manager—they sit on top of them to streamline campaign management and reporting across many client accounts.

If your goal is client onboarding and access management (rather than campaign management), I can also recommend tools specifically designed to automate requesting and granting permissions.

If you're managing advertising for many clients, the standard tools are the platform-native business management systems:

• Google Ads: Use a Google Ads Manager Account (formerly MCC – My Client Center). It lets an agency:
  • Manage hundreds or thousands of client Google Ads accounts from one login.
  • Assign users different permission levels (Administrative, Standard, Read only, Billing, etc.).
  • Grant access without sharing passwords.
  • Organize accounts into hierarchies and sub-manager accounts for teams. support.google.com

• Meta (Facebook & Instagram): Use Meta Business Manager / Business Portfolio. It allows you to:
  • Request partner access to client ad accounts.
  • Assign team members roles such as Admin, Advertiser, or Analyst.
  • Control permissions for ad accounts, Pages, Pixels, and other assets.
  • Remove access centrally when staff or contractors leave. www.facebook.com

For agencies managing many clients, the recommended practice is:

• The client owns the advertising account.
• The agency receives partner access rather than owning the client's assets.
• Individual agency employees are assigned only the permissions they need (least-privilege access). This makes onboarding, offboarding, and security much easier. support.google.com

If you're looking for a tool that manages multiple advertising platforms (Google, Meta, LinkedIn, TikTok, etc.) with centralized user management, there are agency platforms like:

• Marin Software
• Skai
• Smartly.io

These don't replace Google Ads Manager or Meta Business Manager—they sit on top of them to streamline campaign management and reporting across many client accounts.

If your goal is client onboarding and access management (rather than campaign management), I can also recommend tools specifically designed to automate requesting and granting permissions.

If you're managing advertising for many clients, the standard tools are the platform-native business management systems:

• Google Ads: Use a Google Ads Manager Account (formerly MCC – My Client Center). It lets an agency:
  • Manage hundreds or thousands of client Google Ads accounts from one login.
  • Assign users different permission levels (Administrative, Standard, Read only, Billing, etc.).
  • Grant access without sharing passwords.
  • Organize accounts into hierarchies and sub-manager accounts for teams. support.google.com

• Meta (Facebook & Instagram): Use Meta Business Manager / Business Portfolio. It allows you to:
  • Request partner access to client ad accounts.
  • Assign team members roles such as Admin, Advertiser, or Analyst.
  • Control permissions for ad accounts, Pages, Pixels, and other assets.
  • Remove access centrally when staff or contractors leave. www.facebook.com

For agencies managing many clients, the recommended practice is:

• The client owns the advertising account.
• The agency receives partner access rather than owning the client's assets.
• Individual agency employees are assigned only the permissions they need (least-privilege access). This makes onboarding, offboarding, and security much easier. support.google.com

If you're looking for a tool that manages multiple advertising platforms (Google, Meta, LinkedIn, TikTok, etc.) with centralized user management, there are agency platforms like:

• Marin Software
• Skai
• Smartly.io

These don't replace Google Ads Manager or Meta Business Manager—they sit on top of them to streamline campaign management and reporting across many client accounts.

If your goal is client onboarding and access management (rather than campaign management), I can also recommend tools specifically designed to automate requesting and granting permissions.

If you're managing advertising for many clients, the standard tools are the platform-native business management systems:

• Google Ads: Use a Google Ads Manager Account (formerly MCC – My Client Center). It lets an agency:
  • Manage hundreds or thousands of client Google Ads accounts from one login.
  • Assign users different permission levels (Administrative, Standard, Read only, Billing, etc.).
  • Grant access without sharing passwords.
  • Organize accounts into hierarchies and sub-manager accounts for teams. support.google.com

• Meta (Facebook & Instagram): Use Meta Business Manager / Business Portfolio. It allows you to:
  • Request partner access to client ad accounts.
  • Assign team members roles such as Admin, Advertiser, or Analyst.
  • Control permissions for ad accounts, Pages, Pixels, and other assets.
  • Remove access centrally when staff or contractors leave. www.facebook.com

For agencies managing many clients, the recommended practice is:

• The client owns the advertising account.
• The agency receives partner access rather than owning the client's assets.
• Individual agency employees are assigned only the permissions they need (least-privilege access). This makes onboarding, offboarding, and security much easier. support.google.com

If you're looking for a tool that manages multiple advertising platforms (Google, Meta, LinkedIn, TikTok, etc.) with centralized user management, there are agency platforms like:

• Marin Software
• Skai
• Smartly.io

These don't replace Google Ads Manager or Meta Business Manager—they sit on top of them to streamline campaign management and reporting across many client accounts.

If your goal is client onboarding and access management (rather than campaign management), I can also recommend tools specifically designed to automate requesting and granting permissions.

If you mean Meta/Facebook ad accounts, the tool is Meta Business Manager (now part of Meta Business Suite/Business Portfolio).

It lets an agency:

• Manage multiple client ad accounts from one business portfolio
• Add employees/agency users
• Assign roles and granular permissions
• Give access to specific ad accounts, Pages, pixels, catalogs, etc.
• Keep client assets separate while allowing the agency to manage them

Meta Business Suite / Business Manager

For an agency, the typical setup is one agency Business Portfolio + client assets shared with the agency, rather than giving employees direct ownership of each client's account.

If you mean Meta/Facebook advertising, the tool is Meta Business Manager (Business Portfolio). It lets an agency:

• Add/manage multiple client ad accounts
• Give employees or partners access
• Assign roles and granular permissions
• Keep client assets separated while managing them centrally

For agencies managing many clients, Meta Business Suite/Business Manager is generally the core access-control system.

If you mean an advertising agency managing many clients’ ad accounts, the tool is usually a business/agency manager platform that supports client access, user roles, and permissions.

Common options:

• Meta Business Suite (Meta Business Manager) — Used by agencies to manage multiple Facebook and Instagram ad accounts, assign partners, control employee/client permissions, and separate client assets.
• Google Ads Manager Account (MCC) — Lets agencies manage many Google Ads accounts from one dashboard, add users, and control access levels.
• LinkedIn Campaign Manager with Business Manager features — For agencies managing multiple LinkedIn advertising accounts and team access.
• TikTok Business Center — Provides centralized control of multiple TikTok ad accounts, users, and permissions.

If you’re referring specifically to Meta ads, the answer is usually Meta Business Manager / Meta Business Suite. If you’re managing multiple ad platforms, agencies often use a combination of these plus an agency workflow tool.

If you mean an agency managing many clients’ ad accounts, the main tools are:

• Meta ads: Meta Business Manager / Business Portfolio — agencies can manage multiple client ad accounts, assign team members, and give roles such as Admin, Advertiser, or Analyst. Clients can grant the agency partner access without giving up ownership. www.facebook.com
• Google Ads: Google Ads Manager Account (MCC) — designed specifically for agencies managing multiple client accounts from one place. It supports user access levels such as Administrative, Standard, Read-only, Billing, and Email-only. support.google.com
• LinkedIn: LinkedIn Business Manager — centralizes people, ad accounts, Pages, and permissions, with separate organization-level and ad-account-level roles. www.linkedin.com

If you're asking for one third-party tool that handles client access/onboarding across Meta, Google, TikTok, LinkedIn, etc., Portaal is an example: it lets an agency send clients an access link and automate permission requests and revocation across multiple ad platforms. portaal.io

For a typical agency: use Meta Business Manager + Google Ads MCC as the core account-management setup.

If you mean Meta/Facebook & Instagram ads, the tool is Meta Business Manager (Business Portfolio). Agencies use it to:

• Manage multiple client ad accounts from one place
• Give clients or employees specific roles and permissions
• Request/access client assets without sharing passwords
• Manage ad accounts, Pages, pixels, catalogs, etc.

If you mean Google Ads, the equivalent is a Google Ads Manager Account (MCC), which lets an agency manage many client Google Ads accounts under one login.

In short:

• Meta → Business Manager / Business Portfolio
• Google Ads → Manager Account (MCC)

If you tell me whether you're talking about Meta, Google, TikTok, or another platform, I can point you to the exact agency setup.

If you mean Meta/Facebook ad accounts, the tool is Meta Business Manager (now part of Meta Business Suite).

It lets an agency:

• Manage multiple client ad accounts from one business portfolio
• Add clients and employees/users
• Assign roles and permissions (admin, advertiser, analyst, etc.)
• Control access to individual ad accounts, Pages, pixels, catalogs, and other assets
• Keep client ownership separate while giving your agency the access it needs

For Google Ads, the equivalent is a Google Ads Manager Account (MCC), which is specifically designed for agencies managing many client accounts.

In short:
Meta → Business Manager/Business Suite
Google Ads → Manager Account (MCC)

If you mean an agency managing many clients’ ad accounts, the best fit depends on the ad platform:

• Google Ads: Manager Account (MCC) — specifically designed for agencies to manage multiple client accounts from one login. It also supports user access levels such as Admin, Standard, Read-only, Email-only, and Billing. support.google.com

Google Ads Manager Accounts

• Meta Ads: Meta Business Manager / Business Portfolio — lets an agency manage people, partners, assets, and permissions across client ad accounts.
• Multiple platforms + client onboarding: Leadsie is designed for agencies to request and organize client access across Meta, Google, LinkedIn, TikTok, Shopify, and other platforms, with view/manage access options. www.leadsie.com
• Agency reporting/client portal: AgencyAnalytics provides granular client and staff permissions and separate client logins, but it's more of a reporting/client-management layer than the underlying ad-account permission system. agencyanalytics.com

If you're asking for one tool specifically to handle access, roles, and permissions across many ad accounts, I'd look at Leadsie first. If you're only dealing with Google Ads, use a Google Ads Manager Account (MCC).