Why use it?
You can create and edit pages directly within your course.
This is useful to display and update information without needing to upload a file. See When to use a page rather than a file on Moodle docs for more information.
Step 1: Add a Page
Go to the course page and Turn editing on. Scroll to the section where you want your Page to be displayed, click Add an activity or resource and pick Page.
Step 2: Settings
Tip: Click on the question mark icon 
next to any setting to display extra help or click on Moodle Docs for this page link at the bottom of each page in Moodle for accessing context-specific documentation.
General
Enter a meaningful Name and, if required, add a Description.
Content
Use the text editor to add text or media as your Page content.
On completion click Save and return to course.