Use Headings to name a group of pages. In a Block you can have several headings and within the Heading you can have several Pages. If you want to divide your block into different headings you simply add a heading and add your pages to your heading.
In the example below the Heading is the name of a group of pages called “An Introduction to Project Management.”
💡 Headings are optional. If you don't want to add Headings, just leave it blank