Given that Twitter makes it easy to connect with others in real-time, it should come as no surprise that it's reportedly the top platform for brand interaction. Many companies are committed to responding to their online community with a short and sweet tweet.

Twitter is a free social networking site where users broadcast short posts known as tweets. These tweets can contain text, videos, photos or links. To access Twitter, users need an internet connection or smart phone to use the app or website, Twitter.com.

With over 500 million users, it is one of the world's largest social networks and the fifth-most visited website in the world. Users can share text messages, images, and videos through posts (originally called "tweets").

Twitter's primary purpose is to connect its users and allow them to share their thoughts with their followers and others through the use of hashtags. It can be a source of news, entertainment and a marketing tool for businesses.