There are already many questions and answers to them on this topic. Try to query for words like headers, page styles, no headers and the like in the search box at top of page.
Meanwhile, read Pages without enumerate, most recent question on the subject. It is not exactly your concern but a good starter.
Also a recommended reading is the Writer Guide, notably the chapter about page styles.
To show the community your question has been answered, click the ✓ next to the correct answer, and “upvote” by clicking on the ^ arrow of any helpful answers. These are the mechanisms for communicating the quality of the Q&A on this site. Thanks!