Engagement is relevant to understanding the profitable relationship that exists between customers and organisations in a market. This can be evidenced by studying the credibility of WOM and the credibility of eWOM and their impact on engagement. Currently, there is no evidence from other studies to validate this relationship. This article initially analyses how message quality, integrity, extraversion, and ease of use are antecedents of WOM and eWOM credibility and then analyses how the latter generates engagement. This research studies 645 people who for different reasons made trips to national and/or international destinations, and with this input, a structural equation model is presented using SmartPLS (3.0). As a result, it was found that there is a positive relationship between the credibility of WOM, the credibility of eWOM, and engagement. This research serves as the basis for expanding knowledge and customer management in organisations.