If you give a site or app full account access, it can see and change nearly all information in your Google Account. Full account access means a site or app can see and copy your information, edit or delete it, or create new information. Sites or apps with full access can’t change your password, delete your account, or use Google Pay to send, request and receive money.

If you no longer trust a site or an app this is how you handle it from your Google account.

#1. Go to Google’s Security Check-up page from here https://myaccount.google.com/security-checkup

Note
The page shows you the following
# The recent devices from where you have logged in to your Google account.

# Third-party apps that you may have given permission to access the account information and have forgotten about it.

# Recent security events (security activities) taken place on your Google account.

# Sign in and recovery methods including your trusted devices

#2. Click on ‘Third-party access’.

3. When you click it you will see a drop-down mentioning all the apps that have access to your gmail account. Clicking on each app will also show you what specific service the app has access to or automatically turn off all app that have access to your account.

#3. If you want to remove that app’s access to your Google account, simply click on ‘Remove Access’. That’s it.

You can also remove Google service access from all those devices from where you logged in

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