I needed an easy way to share information with other members of our team. Some people were using OneNote, which is a great product, but sharing things can be a little clunky. Our organization was working towards an enterprise solution for this problem, but I needed something right now for what I was working on.
I chose Markdown since I figured it would be easy to convert it to whatever solution the company decided. This ended up being a very useful tool and provided a quick easy way to collaborate with other teammates.