Steemit is a very useful tool to express whatever anyone likes and believes will be of help to others.
The Steemit community self-regulates. Good posts are up-voted and rewarded with Steem $s. Thus it actually pays to create content which others feel compelled to up-vote.
If you join Steemit, it's a good idea to introduce yourself. If it's very good, others will up-vote. I created my introduction, please up-vote if you liked.