Gmail doesn't have the priority inbox feature turned on by default. This feature splits the contents of your regular inbox into sections on the screen: Important and Unread, Important, Unread, Starred, and Everything Else. You can choose which of these to use. Gmail decides what you're likely to classify as important and places those emails in the Important and Unread section using criteria such as how you treated similar messages in the past, how the message is addressed to you, and other factors.
Each email has an importance marker immediately to the left of the sender's name in the Inbox list. It looks like a flag or arrow. When Gmail identifies a particular email as being important based on its criteria, the importance marker is yellow. When it is not recognized as being important, it is just the empty outline of the shape.
At any time, you can click the importance marker and change its status manually. If you want to know why Gmail decided a particular email was important, hover your cursor over the yellow flag and read the explanation. If you disagree, just click the yellow flag to mark it unimportant. This action teaches Gmail which emails you think are important.
How to Turn on Priority Inbox
Here's how to turn on Priority Inbox in the Gmail Settings:
How Gmail Decides Which Emails Are Important
Gmail uses several criteria when deciding which emails to mark as important or not important. Among the criteria are:
Priority Inbox automatically sorts your mail by moving the important messages to the top and separating them from everything else in your inbox. Gmail determines what’s important based on the messages you open, the people you frequently chat with, and the keywords and content in the messages. Priority Inbox is especially helpful if you are overwhelmed with emails and don’t have time to read them all.
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