How are young people Influenced by images, tv, video etc. portrayed in the media?

Have you ever found yourself doing a dance everyone's doing? Or posting new hashtags to fit it. All of that is you being influenced by the media. If you are wearing clothes everyone else is wearing that's a sign. Many people just want to fit in. Since younger people's brains are not fully developed that are looking up to those social media icons. That's why posting things doesn't just affect you it also affects other people.