Pew Research Center, a Washington D.C.-based think tank, surveyed 1,907 adults this spring to learn about their social media habits. Among the discoveries: 31% of all adults who go online now use Pinterest, versus just 15% three years ago. Meanwhile, 28% of all adults who go online now use Instagram versus a mere 13% in 2012.
Twitter also saw significant user growth over the same period, just not quite on the same level as Instagram and Pinterest. LinkedIn was the only social media platform studied that actually saw its user base decrease slightly from 2014 to 2015.