+1 is quite useful in increasing traffic to your website. Here's how- When a user +1's your website, it will send a signal to Google that user liked your website and will from next time show the same website in search engines with better rankings than earlier. For example:- xyz.com initially ranked on 2nd page for a user, now when a user +1 the website, Google will consider it as a vote and improve its ranking in search engine ie. from 2nd page it may jump to 1st page for the same user and user's friends. Hope you got the concept.
yeah as metioned above when people +1 my videos on my website their rankings increases like crazy and visitors start flowing in
one of the best ways to get people to see your products online is to allow sharing of these products on social. google commerce recently announced the addition of +1 buttons to product pages for brands. adding +1 buttons to your product pages makes it easy for your customers to recommend the products they love on your site with a single click.this page is more useful for getting more traffic.
The main advantage of Google+ is to get more traffic to your site and you can getting more traffic by posting worth items in your account.