Twitter is a service for short messages about which groups of people are informed with short messages, the tweets. Registered Twitter users can subscribe to posts from other Twitter participants.
Twitter subscribers are called followers because they follow a particular hashtag and are interested in the topic or person. User profiles or locations can also be referenced in the tweet. For this purpose, the corresponding user profile is provided with the at sign @. Each tweet offers the possibility to register as a follower. For this purpose, each tweet contains a follow registration field.
Additional information such as Internet addresses can be inserted as a short URL to save characters. In addition, there is a forwarding function, retweeting. Using this function, the tweet recipient can forward the tweet to his own followers.