Log into GA4
Visit Google Analytics.
Sign in using the account with Admin access to the desired property.
Access Admin Settings
In the left-hand menu, click on Admin (gear icon).
Select the appropriate account and property under the Account and Property columns.
Navigate to Access Management
In the Property column, click Account Access Management or Property Access Management, depending on the level of access required.
Add a New User
Click the + button in the top-right corner, then select Add Users.
Enter the email address provided by the agency (ensure it’s linked to their Google account).
Set Permissions
Assign Administrator permissions. This grants full access, including the ability to manage all aspects of the property.
Check additional boxes if specific roles (like Data Editor or Viewer) are needed for certain tasks.
Confirm & Invite
Click Add or Invite to finalise.
