What is the difference between "delete" and "logout" in Google accounts?

In order to use various services provided by Google on Android devices, the terminal must be used (login in the Google account).When the login is completed, the information on the terminal will be registered on the Google server, and then the information linked to the account, such as email and contacts, will be synchronized and accumulated on the terminal.

When handing over the Android device to another person, "delete a Google account device" to delete personal information.Then, data such as emails and contacts linked to the Google account will be deleted and will not be available.

In this case, the data accumulated on the terminal is deleted, with a string between the terminal and the Google server.Since the Google account itself is not deleted (it is possible, it is not described here), if you log in to another terminal with that account, you will be able to use data such as the same email and contacts again.

On the other hand, "logout" refers to eliminating the string between the Google account and the terminal.Data such as emails and contacts accumulated on the terminal remains as it is, so you can use it again by logging in.Logout processing can be performed remotely by logging in to Google account on a PC web browser and opening the screen in the order of "Security" → "Used devices".

When the Android device is initialized, it will also be deleted from the device of the Google Account linked to the device linked to the device linked to the device, in addition to deleting data/files such as installed applications and photos.There is no longer a concern about personal information leakage, but Android devices, which have a terminal protection function, are required to log in with a Google account used before, so log out from the PC web browser.