Social anxiety (SA) is a fairly common human experience which involves fear of negative evaluation from others and feelings of anxiety around social or performance situations (American Psychiatric Association, 2013; Morrison & Heimberg, 2013). In recent years, social interactions have increasingly begun to take place online (Eraslan-Capan, 2015). The aim of this thesis was to explore the relationships between feelings of SA and use of Facebook, a popular social networking website. The systematic review focussed on exploring the potential benefits and disadvantages of using Facebook for people with SA, whilst the empirical study explored predictors of comfort interacting on Facebook and face-to-face in these individuals.