Wait a second. Posting your website link into FB, Twitter and having loads of G+, rank you better than those without that.
No dear. Your concepts are wrong. Read whole Facebook study done by Eric Enge
https://www.stonetemple.com/does-facebook-activity-impact-seo/ . Here is copy paste of conclusion.
"
Conclusions
Let’s keep this simple and offer a summary of conclusions:
1. Clearly Google does not use the Like data. They don’t have it, except for raw aggregate numbers to which they can attach no value. This conclusion is supported by the test we did to see if 800 or more Likes attracted Google’s attention. It did not.
2. Our Attempt to Directly Measure Indexing and Ranking of Facebook Shared Links Was Inconclusive. We just did not have enough participation to be sure of the results. However, the data we did have showed that Google did not even crawl the pages based on Facebook shares. This is an indicator that Google does not use this either, but we can’t take that one to the bank.
3. If Your Profile is Public, Google Can See Who Your Friends are if They Want. They need to crawl the mobile version of Facebook to do so, but it is certainly available to them.
4. Google Does not Index All Shares on Prominent Profiles. Even for megastars, Google’s indexing of their posts is inconsistent. Under 60% of all their posts are indexed. Interestingly enough, they do index 85% of the posts that contain links, but still not 100%.
5. Query Deserves Freshness Behavior is Not in Evidence. There is no material evidence to show that posts are more likely to be indexed when they are new (and then dropped from the index later). The only interesting exception is images.
My net conclusion – Google doesn’t use Facebook as a discovery, indexing, or ranking factor."