It can give us some advantage in terms of promoting our brand but it is not effective in terms of ranking our keywords in search engines. Like for twitter, there's no way we can do to increase keywords ranking because as you can see, we can't post link text on it as it only accepts direct URLs which is likely the same with Facebook. Although facebook has a lot to offer, Google doesn't really counts links coming from it because all links are made no-follow.There is a lot of talk at the moment about Social networking sites (Facebook Twitter). Do really they help at all with google ranking or are they just a marketing tool?
I completely agree with you on Google search benefits , because in face or twitter we can just place the url we can't put link on particular key words so our ranking wouldn't increase i have observed that the pages created by us in face book are some time coming in Google search result .Not a whole lot really. Twitter I wouldn't imagine would pass on much relevant or authority. I trust Google's search quality team are dropping the authority passed from Facebook etc as it's largely open to spam.
The thing about social media is it's about engaging and networking. While it mightn't directly increase authority/PageRank (who cares about PR?), it's an important source of traffic and business for many people.
If you are a consultant or professional, you may be more effective engaging directly with people instead of visitor numbers.
I rarely get any results from using Facebook, esp twitter. Unless you have thousands for likes and follows its difficult get people interested in your service.There is a lot of talk at the moment about Social networking sites (Facebook Twitter). Do really they help at all with google ranking or are they just a marketing tool?
sure, that's completely right