The fake sites use a similar URL to Facebook.com in an attempt to steal people’s login information. Sometimes spammers create fake pages that look like the Facebook login page. When you enter your email and password on one of these pages, the spammer records your information and keeps it. The people behind these websites, then use the information to access victims’ accounts and send messages to their friends. In some instances, the phishers make money by exploiting the personal information they’ve obtained.
Source: https://thehackernews.com/2011/11/exposing-25-facebook-phishing-websites.html