Marketing in Social Networks

On Saturday I went to a party called "Life in Color". On Sunday my father asked me how did I find out about it; if it was because of the Social Networks, and i started to think that that was indeed the way i found out. Actually there wasn't any advertisement in the street walls, malls or anything. Facebook was the principal source of commercial and marketing for this party, and it had a big call on people, because there was 20.400 people confirmed in the Facebook's event and all the tickets were sold in one day. I think it's big deal because it was the only source of announcement, it became a "viral" advertising in the social networks and spread between young people across the country. I was one of them, i found out about the event on Facebook and because of that i went to this party. I feel like if i hadn't seen it on this, i would not have attended to it. Facebook, Twitter and all the social networks have an important impact on people, informations, news and decisions through the advertising and marketing.