Do Social Networks Influence Your Buying Decisions?

Social network is a place where there's a high chance of getting your purchase decisions influenced. However, a recent study showed that ( <a href="https://techcrunch.com/2012/01/12/social-networks-influence-shopping/" target="_blank" rel="noopener noreferrer">Survey: 80% Say Social Networks Had No Influence On Holiday Shopping Decisions • TechCrunch</a> ) for 80% of the users; the social networks did not influence the items they purchased during the holiday season.

So here's a question: Do you think social network influence your purchase decisions. If yes, why & how?