Tabs:

The instagram horizontal menu bar displays a lots of tabs which carry a certain job.

One can tap on the feed tab to get news feeds of the people the user is in contact with.

An out of the box concept, the Popular Tab refers to a section that puts light on the news feeds of people getting attention by the Instagram community.

There is a specific  that specially carries the job of notifying the user in case he or she has not a comment, or a like on the picture the user has uploaded.

An user even carries the privilege of liking and commenting on other pictures.

A tab in the menu bar enables the user to visit his own profile.