According to the “Social Media Update 2013” from the Pew Internet & American Life Project, some 73 percent of online adults now use a social networking site of some kind.

Pew reports that Facebook is the dominant social networking platform in the number of users, but a striking number of users are now diversifying onto other platforms. Some 42 percent of online adults now use multiple social networking sites. In addition, Instagram users are nearly as likely as Facebook users to check in to the site on a daily basis.

71 percent of online adults are now Facebook users, a slight increase from the 67 percent of online adults who used Facebook as of late 2012.

Facebook also has high levels of engagement among its users: 63 percent of Facebook users visit the site at least once a day, with 40 percent doing so multiple times throughout the day.
Instagram and Twitter have a significantly smaller number of users than Facebook does, but users of these sites also tend to visit them frequently. Some 57 percent of Instagram users visit the site at least once a day (with 35 percent doing so multiple times per day), and 46 percent of Twitter users are daily visitors (with 29 percent visiting multiple times per day).

These are among the key findings on social networking site usage and adoption from a new survey from the Pew Research Center’s Internet Project.

If you’d like to read more, you can check out Pew’s report (PDF).