Google introduces brand new Gmail inbox for Desktop and mobile devices, it automatically groups all your email messages in five different of tabs like Primary, Offers, Updates, Social. So can easily identify certain group of emails in specific tab in your inbox.
You can easily move your messages between tabs by drag and drop the specific message. And you can set certain senders in particular tabs and star messages. The Gmail app for Android and iOS shows primary mail, when you open the app it shows all other tabs.
To enable new style inbox click on the gear icon in your Gmail account then select Configure Inbox. In case if you don't like this new inbox there is option to revert your inbox style to classic and other styles.
The new inbox is rolling out gradually. The desktop, Android and iOS versions will become available within the next few weeks.