When you receive new mail, you’ll see an indicator in each tab that tells you how many new messages you’ve received since you last checked that tab. You’ll also see a few of the recent senders listed below the category name. You can see what’s new at a glance and decide which emails you want to read.
If you looked at your Promotions tab yesterday and then received eight promotional emails, you’ll see “8 new” next to the word “Promotions” when you check your Gmail today.
The number next to Inbox on the left side of your Gmail tells you how many unread messages are in your Primary tab.
Move messages between tabs
If you see a message in your inbox that you want in a different tab, all you have to do is drag and drop it into the other tab. Another way to do this is to right-click a message while viewing your inbox.
After you move a message to a different tab, a message above your inbox will ask if you want to undo that action or choose to always put messages from that sender in the tab you chose.
Messages you mark with a star will also appear in your Primary tab so they are easier to keep track of.
Ready to organize your email? It’s already done
Your emails are organized into a few categories, and will be waiting for you under different tabs. For example, if you receive an email about a sale from a shopping site, you’ll find that email under the Promotions tab.