Other platforms like Twitter, Instagram, Pinterest and LinkedIn saw significant increases over the past year in the proportion of online adults who now use their sites. The results in this report are based on the 81% of American adults who use the internet. Other key findings: - Multi-platform use is on the rise: 52% of online adults now use two or more social media sites, a significant increase from 2013, when it stood at 42% of internet users. - For the first time, more than half of all online adults 65 and older (56%) use Facebook. This represents 31% of all seniors. - For the first time, roughly half of internet-using young adults ages 18-29 (53%) use Instagram. And half 0f all Instagram users (49%) use the site daily. - For the first time, the share of internet users with college educations using LinkedIn reached 50%. - Women dominate Pinterest: 42% of online women now use the platform, compared with 13% of online men. Get the full story at PewResearch Read also "Facebook Users Aren’t Facebook-Exclusive" at AllFacebook