One of the Pinterest co-founders, Ben Silbermann, was quoted saying:
“Pinterest is a visual site, and a lot of people are visual by nature. […] But at its core, Pinterest is a site that connects people who are passionate about the same things. In the same way that people who use Facebook are excited to connect with people they care about, people on Pinterest are excited to be inspired by people with similar tastes.”
Studies have also shown that Pinterest is now responsible for a larger amound of referral traffic than Reddit, Google+, LinkedIn and Youtube. Now those are impressive statistics!