The final step to convert your prospects with paid advertising is to test and analyze your results. You should use tools like Google Analytics, Facebook Pixel, or other tracking and measurement tools to monitor and evaluate your campaign performance and conversion rate. You should also use methods like A/B testing, multivariate testing, or split testing to experiment with different elements of your ads and landing pages, such as headlines, images, copy, CTAs, colors, layouts, and more. By testing and analyzing your results, you can identify what works and what doesn't, and make data-driven decisions to optimize and improve your campaigns.