There are a lot of tools nowadays that you can use to build an online community. People have been building communities through Facebook Groups since Facebook Groups were a thing. Since then, Facebook Groups have exploded into every variety of community out there.
Lots of entrepreneurs have taken notice of the power of Facebook to connect people and communities and tried to one-up these groups through specialized community buy/sell platforms. Otherwise, you can build a branded community for your brand. Through Answercart community forum software it's easy to launch a new community in one hour.
The software is completely customizable based on the brand need.