If you no longer use your Gmail account or want to delete it for reasons of security, it is important to know how to delete a Gmail account correctly. This process deletes your emails, contacts, and data associated with the account, so make sure to back up the information important before proceeding.
To delete an account from your computer or laptop, sign in to your Google account and go to Data and privacy → Your data and options privacy → Delete a Google service. Select Gmail and follow the instructions to confirm the deletion. Google may ask you to provide another valid email address to continue with other associated services.
If you want to delete a Gmail account from your laptop without deleting it completely, you can simply remove the account from the browser or the email app. In Gmail, go to Settings → Accounts and import → Delete account (or “Sign out and remove account from device“) as applicable.
In summary, deleting a Gmail account can be total or only from the device, depending on whether you want to free up space and security or simply disconnect your email from your laptop.