Twitter

Twitter is a messaging service and social media app that is available for iOS, iPadOS, and tvOS. Registered users are allowed to send and receive short posts called "tweets", which can be up to 280 characters long and can include links to relevant websites and resources.

Twitter users follow other users. If you follow someone you can see their tweets in your twitter 'timeline'. You can choose to follow people and organizations with similar academic and personal interests to you.