Prioritising which website or funnel elements to test for conversion rate optimisation (CRO) requires a data-driven and strategic approach. Here's how to tackle it. First, solidify your goals and the metrics that reflect success. Are you aiming for more sign-ups, purchases, or content downloads? Then, analyse website user behaviour using heatmaps and session recordings to pinpoint areas where visitors might be dropping off. This can reveal issues with navigation, unclear calls to action, or confusing layouts.

Next, consider prioritisation frameworks like PIE (Potential, Importance, Ease) or RICE (Reach, Impact, Confidence, Effort). These frameworks assign scores based on factors like the potential impact of a change, the ease of implementing a test, and the confidence you have in seeing a positive result. This helps you identify tests that offer a high potential for improvement with minimal resources.

Measuring the success of a conversion rate optimisation (CRO) campaign hinges on defining your goals and tracking the right metrics. First, identify what a "conversion" means for you - is it a sale, a signup, or a download? Then, choose key performance indicators (KPIs) that reflect those goals. Common ones include conversion rate (overall percentage of visitors who convert), macro-conversions (important actions like purchases), micro-conversions (smaller steps towards a conversion), and revenue per visitor.

Beyond just conversion rate, consider the return on ad spend (ROAS) to gauge campaign profitability. User experience (UX) also plays a role - surveys that measure customer satisfaction (like Net Promoter Score) can indirectly reflect CRO success.