¿De que manera valora google o bing el aspecto social?. ¿Cuenta lo que pasa en twitter y en otras redes sociales?

Both Google and Bing have added many social search features over the past year. There’s also been talk about using “social signals” to help rank regular search results. But are either of the major search engines actually using those social signals to rank regular search results? A bit, they tell me. In particular, your stature on Twitter could help influence how a page ranks in web search.