What are Gmail tabs?
Gmail allows you to separate your Inbox into several categories that appear as tabs. These categories are Primary, Social, Updates, Forums, and Promotions. These allow Gmail to filter different emails into different tabs, which then allows you to focus your attention on each tab as needed.
Why is TAB not working in Gmail?
If you've ever tried to use the "Tab" key when typing out an email in Gmail, you may have been really confused about why it didn't work. Unfortunately, it's simply not supported by the email platform. Instead, you'll have to use a keyboard shortcut to get it done.
Can you have tabs in Gmail?
Add or remove category tabs
In the 'Inbox type' section, select Default. Note: To hide all tabs, select another inbox type. In the 'Categories' section, tick the boxes of tabs that you want to see. Note: You can't make new tabs; you can only display or hide existing ones.