Checklist HTML is an incredibly helpful tool for web designers and developers, as it allows them to quickly and easily check the quality of their work. It helps them ensure that all the necessary pieces are in place before going live, such as the correct page structure, accessibility features and other important elements. By using a checklist, developers can save time and money by not having to fix problems or update code after launch. Checklist HTML also provides a great reference point during development, allowing developers to easily recall what needs to be done later on.