Pinterest keeps growing and has now amassed 70 million users. This means nearly one in every six people who use the Internet are on Pinterest. According to Pew research, these users are well educated and 18% have an annual income of $75,000 or more.
In other words, Pinterest is being utilized by an extraordinary amount of people, many of whom likely carry influential weight in the online community. It would be remiss not to optimize your presence here for a variety of reasons.