What are the best practices for using website popups?

The best practices for using website popups include focusing on the user experience, timing them smartly, and making them genuinely helpful. Make sure popups show up when they make sense, like after someone scrolls or shows exit intent, not right as they land. Keep your message clear, the design clean, and always offer something valuable. Make sure users can close it easily, and personalize your message when possible for better results.