Any time you interact with Facebook — whether you're checking into a location, posting vacation photos, or "liking" a friend's status — you are giving Facebook data. Any time you interact with a third-party developer — games such as FarmVille and apps that show you what your profile photo would look like if you were older or a different gender, or tell you what the most popular song was the year you graduated from high school — you are giving your data to Facebook and to that developer. (Sometimes in ways you might not realize: sharing a post about the most popular song during the year you graduated high school tells Facebook what year you graduated from high school, even if that information isn't on your profile.)

Source: Los Angeles Times March 24, 2018 09:56 UTC