A heatmap tool shows where visitors click, scroll, or spend time on a page. The simplest way to use one is to sign up for a free heatmap service and add a small tracking code to your website. After some days, the tool will show color areas on your page. Bright areas mean more activity. This helps you see what people notice and what they ignore. With this data, you can adjust layout and buttons. Would testing one page first make sense?