When no one clicks your button, it usually means something in the email is not guiding them clearly. The button might be too small, hidden, or unclear. The message before the button may also not explain why someone should click, which can lower interest. You can test different button texts, colors, and placements. For example, placing the button after a short and clear explanation often works better than placing it at the very end with no context. Sometimes adding one simple example of how the click will help them can motivate action. Have you tried checking if your button feels easy to spot and understand at first glance?