1. Twitter is a social media platform that allows users to post messages called tweets that are up to 140 characters. It can be used to communicate with others, share information, and follow topics through hashtags.
2. The document discusses several advantages of Twitter for students, including organizing events, connecting students and teachers, facilitating class discussions, and aiding research.
3. Twitter can enhance classroom learning by allowing students to share opinions, ask questions, discuss topics, and engage with each other and teachers outside of class.