Andrew Perrin:

Most notably, 44% of younger users (those ages 18 to 29) say they have deleted the Facebook app from their phone in the past year, nearly four times the share of users ages 65 and older (12%) who have done so. Similarly, older users are much less likely to say they have adjusted their Facebook privacy settings in the past 12 months: Only a third of Facebook users 65 and older have done this, compared with 64% of younger users. In earlier research, Pew Research Center has found that a larger share of younger than older adults use Facebook. Still, similar shares of older and younger users have taken a break from Facebook for a period of several weeks or more.