To delete a Google account, follow these steps: On Desktop:

1. Go to https://myaccount.google.com/ and sign in.
2. Click "Data & privacy."
3. Scroll down to "Your data & privacy options," then click "More options."
4. Select "Delete your Google Account."
5. Verify your identity by entering your password.
6. Check the confirmation boxes and click "Delete account" to finalize.

On Mobile:

1. Open the Google app and sign in.
2. Tap your profile picture at the top right corner and select "Manage your Google Account."
3. Go to "Data and Privacy."
4. Scroll down and tap "Delete your Google Account."
5. Enter your credentials and confirm deletion.

Before deleting, Google recommends downloading your data because once deleted, all associated data and services (like Gmail, YouTube, Google Drive) will be permanently removed and cannot be recovered. Deleting a Google account is irreversible.