What is conversion rate optimization (CRO) and which tactics improve it?

• A. A method to reduce bounce rate by removing content.
• B. A focus on increasing ad spend without optimizing conversions.
• C. A process of increasing the percentage of visitors who view pages but not necessarily convert.
• D. A process of increasing the percentage of visitors who convert; tactics include landing page tests, mobile optimization, trust signals, and optimizing forms.

Answer: (D)

Conversion rate optimization is about increasing the percentage of visitors who complete a desired action, turning more of your traffic into customers or leads. It focuses on the actual end goal—conversions—rather than just getting people to visit or stay longer. To achieve that, you test and improve the steps people take on your site, making it easier and more persuasive to convert.

The tactics mentioned are solid examples of how this works. Landing page tests (A/B testing) compare different versions of a page to see which elements—such as headlines, CTAs, or form layouts—best drive conversions. Mobile optimization ensures the experience on smartphones and tablets is smooth, fast, and easy to navigate, which is crucial since a large portion of traffic comes from mobile devices. Trust signals, like customer reviews, testimonials, and security badges, reduce perceived risk and increase credibility, encouraging visitors to convert. Optimizing forms reduces friction in the final step—shorter forms, clear labels, real-time validation, and sensible defaults help more people complete the form.

In short, CRO is about boosting the conversion rate by making the user journey more effective and trustworthy, using iterative testing and targeted improvements like those listed. Other approaches that focus on traffic alone or on viewing pages without aiming for a completed action don’t align with the goal of increasing conversions.