@jonle1...Pop it in a search engine and get a good schooling...
It's pretty much a correction of a platform to make it 'better'. But, this is a novice explanation....
One of the best things I've learned since joining Steemit is, do your own research for the most accurate results ;+)!!!!
Also, following experts, such as @taskmaster4450 helps one gain a lot of knowledge as well.
Peace.