Facebook Likes

Site gets more traffic when it has valuable information in it. When the valuable information gets shared on social media, the website will get more traffic. Which in turn tells the search engine that the website got some useful information which users really want to look into, therefore the website will get higher rank for related search terms. This is how Facebook likes contribute in a website's ranking.

If you create a page, and it has a lot of likes, and you link out to your website in the About section, that is good for Google rankings.