Electronic word-of-mouth (eWOM) has a powerful influence on consumers’ purchase decisions. This influence varies with the source of the eWOM and product type. This study investigated how eWOM quality influences eWOM credibility and purchase intention and how this influence is moderated by the type of eWOM platform and product type. An experimental design was adopted, in which scenarios were manipulated to facilitate the collection of information. The results show that the type of eWOM platform moderates the influence of eWOM quality on eWOM credibility and purchase intention, and this phenomenon is particularly significant in search goods. These also further confirm that eWOM credibility is a partial mediator between eWOM quality and purchase intention. This study confirms the importance of establishing user-oriented online reply systems. The findings also demonstrate the degree to which the type of eWOM platform management mechanism influences the corporate management of eWOM. Furthermore, findings suggest a number of eWOM management mechanisms based on ethical marketing standards.