To measure your conversion rate and ROI, you need to use some tools and methods that can track and analyze your online marketing performance. Google Analytics is a free web analytics tool that can help you measure website traffic, conversions, and revenue. You can set up goals and e-commerce tracking to monitor your conversion rate and ROI for different sources, channels, and campaigns. Google Ads is a paid online advertising platform that enables you to create and run ads on Google search, display, and video networks. Conversion tracking and Google Analytics integration can be used to measure conversion rate and ROI. Facebook Ads is a paid social media advertising platform that allows you to create and run ads on Facebook, Instagram, and Messenger. Pixel tracking and Facebook Analytics integration can be used to measure the conversion rate and ROI of your Facebook ads. Landing page builders are tools that enable you to create and optimize landing pages for your online marketing campaigns. These pages are designed to persuade visitors to take a specific action, such as downloading an ebook or buying a product. A/B testing, heatmaps, and analytics integration can be used to measure the conversion rate and ROI of your landing pages.