Facebook allows users to post photos, write status updates, and privately message friends. The author enjoys posting photos and writing statuses on their Facebook account but does not often message others. Twitter is the second most popular social media site, where users can post tweets, photos, and retweet others' posts. The author typically retweets others on Twitter and occasionally shares their own tweets. Instagram focuses on photo sharing where users can post and like/comment on photos. The author does not use Instagram frequently but will interact when others like or follow their photos.