If you have old emails from years ago still sitting in your inbox then now is the time to clear them out, and there's a quick way to do it.
Click “Search.” Gmail will display all emails older than your chosen date. Select All → Delete. You’ll see a checkbox above your emails. Click it, then choose “Select all conversations that match this ...
If your Gmail account has a big red number showing hundreds or even thousands of unread emails, it’s probably slowing you down and eating up your Google storage space.