This Section shows the items that you have starred in Chats and Posts. In mobile devices, click More option to access Starred Items. On web, in left navigational panel select Chat and click on the Star button above the message header to view all the Starred Chats.
To star a chat in web, click the star icon to the right of the message. In mobile, long press on the message and star/remove star from the message.
To star a post in web, select star from the three dots menu option next to the post.
In mobile, click the star icon below the post.