https://www.cnet.com/news/facebook-data-policy-answers-to-your-privacy-questions-cambridge-analytica/

Facebook, the world's largest social network, revamped the policies it uses when collecting data on the more than 2 billion people who use it every month. As part of the new policy, released April 19, the company is also spelling out more clearly how it collects and uses that information about you. 

The new policy comes in at more than 4,200 words. The language is meant to be easy to understand, but that's still a lot of words to get through. Each one, however, helps us better understand how the company turns our data into personalized recommendations, tailored advertisements and academic research.