Here's How Many People Are on Facebook, Instagram, Twitter and Other Big Social Networks

In many ways, the monthly active user count is the most important number in tech.

In many ways, the monthly active user count is the most important number in tech. It’s a key performance indicator that helps determine the general popularity of a given network, along with being used to help determine value. Here’s a look at the monthly active user (MAU) count for seven of the major social networks.