twitter will be really such a powertool if used wisely. Take note: twitter with no follower is useless, you need to build up your reputation and authority to maximize the twitter in your SEO.
Twitter is a social networking site, it is very important to leave your site links to promote to that.
The benefit of using Twitter in SEO is that it will get high quality traffic and will direct it towards your website..
twitter is a social networking site so it will not give direct benefit...its take many time to get benefit from twitter, facebook or any other social networking site. twitter will defiantly helps to increase visit but also it depends on title of your tweets.
Twitter is helpful in terms of traffic for spammers. They get traffic but the real thing that should be considered is the relevancy of the visit. Twitter is really good in improving your connection with your business partners. It is also helpful to tell your followers about a new product launch. In other sense sending 20 tweets in 5 seconds with the same matter is nothing other than spam which brings useless traffic with high bounce rate.