"Although there are many methods such as black hat ways (you can check it out on Wikipedia here), SEO can mainly revolve around content (white hat), and social media fuels that.
As you can see in the picture above, YouTube videos come up too.
Try Googling your own name and you”ll also find that retweets, tagged photos, Facebook statuses and so on appear too.
The question is, which do you prioritise? SEO is your car, and social media is petrol".
Via Antonino Militello