You can read about it here
It’s another social media hangout and some people don’t like it but I love it. Some people prefer Instagram (I can’t stand) and some people prefer Facebook (which I left after Twitter came out). It’s all in what your personal preference is. I get breaking news from all kinds of news outlets all over the world constantly all day and information from my friends pertaining to information that we share a common interest in. It’s informative and fun. But, again, it’s not for everyone.
Among other things, I use it to send up links to really stupid Y!A questions.
So Trump has a hobby.
To make as much money as possible. Like any business.