Determining a good CPC is closely tied to the return on investment (ROI) it brings. This value varies significantly across different industries and is influenced by the potential returns. For instance, in industries like personal injury law, the CPC can sometimes exceed $40. While this may seem high, consider the potential returns; a single click in such cases can lead to a multi-million dollar injury case. Therefore, a ‘good’ CPC should be evaluated in the context of the potential revenue it can generate rather than just the cost itself.