A majority of Facebook users have 10 or more categories listed on their ad preferences page
The Center’s representative sample of American Facebook users finds that 88% say they are assigned categories in this system, while 11% say that after they are directed to their ad preferences page they get a message saying, “You have no behaviors.”
Some six-in-ten Facebook users report their preferences page lists either 10 to 20 (27%) or 21 or more (33%) categories for them, while 27% note their list contains fewer than 10 categories.
A majority of Facebook users have 10 or  | more categories listed on their ad  | preferences page  | % ofus adult Facebook users with  | categories listed  | on their ad preferences page  | Not assigned to a category  | Did not give an  | 11%  | answer 2%  | Fewer than  | 27%  | 10 categories  | 21+  | 33%  | categories  | 27%  | 10 to 20  | categories  | Source: Survey of Facebook users conducted Sept 4-Oct. 1, 2018  | "Facebook Algorithms and Personal Data  | PEW RESEARCH CENTER 