Here Are Some Unpopular HTML5 Tags/Attributes That You Should Know Of 👇 💡 Start attribute --- allows you to specify starting a number for your list items. You can use the start attribute in an ordered list tag <ol> 💡 Contenteditable attribute (content editable) --- When we set this attribute to true in HTML5, your content will be editable. 💡 required attribute --- The required attribute sets it that the input fields are mandatory to be filled. 💡 Mark Tag --- The tag is used to mark instead