Yes, it can be helpful in driving more traffic to your site, if you know how to use it properly. One of the more recent things trending is the addition of the "pin it" button that you put onto your site. If you have one of these, people can easily press it to directly pin your image (and your site information) to their boards. If you do not have this, there are a number of people that will not pin because they find it too tedious to install their own "pin it" tab to their bookmark bar. Images that convey your product/service/cause must be eye catching. Often times, people will pin just because of the image & not come back to read what's on the site until later...meanwhile all of the people that are "following" them see and repin the image. It reaches a broad audience this way, just because of a really good image. Of course, if there is not good content to back up the image, people will eventually delete the pin. I hope this helps to answer your question!