The home page is the first things students see whenever they log into your course. Normally, this should be the syllabus page, or a page showing the major items in your course.
Before you can set a canvas page as the home page, you need to set it to be the Front Page.
Most of the time, the Syllabus page is the best page to set as your Home page.
Want to use a page other than the Syllabus page? Setting the Home Page (step-by-step)
You can change the Home page whenever needed.