The concept and practice of online customer engagement enables organisations to respond to the fundamental changes in customer behaviour that the internet has brought about, as well as to the increasing ineffectiveness of the traditional 'interrupt and repeat', broadcast model of advertising. Due to the fragmentation and specialisation of media and audiences, as well as the proliferation of community- and user generated content, businesses are increasingly losing the power to dictate the communications agenda. Simultaneously, lower switching costs, the geographical widening of the market and the vast choice of content, services and products available online have weakened customer loyalty. Enhancing customers' firm- and market- related expertise has been shown to engage customers, strengthen their loyalty, and emotionally tie them more closely to a firm.