Instagram is a fun photo and video sharing app popular with guys and sexy girls. Users have their unique usernames and communicate by posting comments to each other under photos and videos. Insta has a direct photo messaging feature that allows friends to send private photos or nudes to one another. This is a prime spot for sexting with horny people. One of the greatest features of Instagram is its privacy settings. This ensures that outside users - people who are not following you - have to request your permission to see your photos. Hashtags are extremely useful for people looking to draw more followers to their profile. This way Instagram can be a positive, self-reinforcing application. Likes and comments on a picture can help boost self-esteem and make it more likely to maintain friendships. It is also just one more way for people to keep in touch with long-distance friends and feel like the photographed events in their life are important and worthy.