Customer engagement is an important topic for organisations, providing a range of outcomes, including contributing to their financial performance. For tourism establishments and destinations, having engagement tourisms can result in repeat visits and positive comments. The importance of engagement means that it needs to be measured. The purpose of this chapter is to examine diverse metrics that can be used to measure online and offline engagement and how they can be used by tourism establishments. It includes behaviour and perceptions which are measured using a range of metrics. It is proposed that customer engagement value comprises several metrics across a range of transactional and non-transactional behaviours, including referrals. Each of these metrics and their associated measurement techniques are presented and their application to the hospitality industry is indicated.