Twitter is like a big playground where people can talk to each other by writing messages that are called tweets. Everybody can see what you write and tweet back to you too.
Sometimes, important people like actors, singers, or politicians come to this playground and write tweets for everyone to see. They do this because they want to share their opinions, views, or ideas with lots of other people or their fans.
It's like when you draw a pretty picture and show it to your friends in the playground. These important people want to show off what they know or think about things, and Twitter is a place where they can do that.
But, it's not just a fun thing for them! Sometimes, they use Twitter to tell people about important events or even to share news that others might not know about yet. They can also connect with fans and supporters, answer their questions or even thank them for their support.
So, the next time you see an important person tweeting on Twitter, remember that they are just like you, sharing their thoughts and ideas with everybody on the playground.