If you’re searching for Nike shoes, you might go to Nike.com and browse. But what if you want to know more about Nike as a company? Say you wanted to research their sustainability commitments and practices before you buy your new kicks. In that case, you can visit nike.com/sustainability and find a whole mini-website dedicated to everything Nike and eco-friendly.

Nike’s sustainability hub is a great example of a microsite. It helps a particular audience explore a single topic, with depth and bre...