Popularity means how many people like you or know you. It's like when you have a lot of friends at school and everyone wants to play with you. People usually become popular when they are friendly, kind, and nice to everyone.
When someone is popular, they have a lot of attention and people want to be around them because they feel happy and comfortable. People who are popular can also influence others because they have a lot of followers or fans.
However, it's also important to remember that popularity is not everything. It's more important to be yourself and treat others with kindness and respect. Sometimes people can be mean to others just to be popular, but being kind and respectful to everyone is what really matters.