Conversion Rate Optimization:How to Increase CRO – CRB Tech CRB Tech reviews would like to elaborate on the topic of conversion rate optimization in this blog. Definition: Conversion Rate Optimization (CRO) is the procedure of analyzing feedback from user and examination to distinguish barriers to conversion (which is the point at which a consumer does an activity you need them to—so conversion can mean anything from turning into a paying client to something as straightforward as signing up for newsletter) on your site and after that evacuate them.