But wouldn't the product sell itself if it is good, why is there need for such content
Well, there have been surveys done by various bodies across the world, which indicate that poor communication strategy and marketing accounts for more than 40% of the reasons behind failure of newly emerging companies.
It's pretty obvious, because we all know communication makes the people to get to know more about what is the whole content of the platform. Lack of information means it can lead to create problems that may cause trouble and so they should take communication seriously.