I found it interesting that the article described the “stereotypes” Facebook has created. Facebook allows you to provide information about your age, sex, race, etc. But the photos and likes you have can easily describe who you are as a person. If you’re single lady, your profile pictures are more likely to be of you having fun. A married man may have a photo with his wife and kids. These were two examples given in the article.
I think the article points out how knowing who is using Facebook and why makes Facebook a beneficial source of information. Facebook is used to promote who you are and what you believe in and to interact with those who may share those views.