When you sign in to your Gmail or Google account, you're also signed in to many of Google's products, including the Chrome browser. This article explains the different ways you can sign out of Google Chrome.
How to sign out of your Chrome account
On a computer, you can sign out of Chrome and your Google Account from most Google websites. Find your Google profile picture in the upper-right corner of the page.
Click on your profile picture and select Log out. The process is slightly different on a smartphone. The screenshots below are for Android.
In the Gmail app for Android and iOS, tap your profile picture in the top-right corner of the app (bottom-right for iOS).