The short answer is YES, but you may wonder why you really need social media sharing buttons on your website. Each time a web visitor clicks the "Like," "Tweet," or "+1" button, it is a natural, organic way of saying "Hey this is good stuff!" Facebook, Twitter, and search engines try to use this data to rank you in search engines and provide accurate ads for you on their sites.
In addition to data gathering, people trust their friends and followers on social media sites. When you share an article or blog post on a social network, it has a chance to be seen by thousands of people. It automatically creates a link back to your site that could be followed by any friend or follower of the person that "liked" it. Social media is proven to drive targeted traffic to websites that integrate on every page of their site.
It's very easy to add sharing buttons to your website. Just go to AddThis.com and sign up for an account. They will walk you through the very simple process of getting Facebook, Twitter, and Google +1 buttons on your site. If you are Foster Web Marketing client, you already have them!