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This method does not hurt nor boost your SEO directly but is a great feature for the actual users on your site. This is a great way to promote your posts on your site and inform your audience of your social media accounts. It also gives them a taste of what you are doing on social media. So while it will not directly affect your rankings, it can bring you more "likes" and "followers" that will see your posts on social media - driving more return traffic to your site and more chances to obtain links and shares.

Hi, Social shares are now more important than keywords, social signals correlate highly with good rankings. Five of the top six signals are social: Facebook shares, Facebook total, Facebook comments, Facebook "likes," and tweets, so quality of FB likes and shared are important.