Communities based on practice

This is a group driven by a shared interest in a particular subject (for example, anti-animal abuse).

It is slightly different from a community based on a common activity.

Purposeful communities are those that share a vision of the world. They don’t always have user groups and are often not geography dependent. 

Finding people with a common purpose means finding those who share a concrete commitment to a specific cause, and this involves a more sophist...

This is a group based on being of or in a certain place.

To build such communities, use dedicated websites or use geolocation on your social media to find information about upcoming events, news and people close to you that you might find interesting.