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In Moodle, a page resource displays content created by the instructor. A Page can contain text, images, audio or video media, or hyperlinks to other web pages.
For smaller amounts of information, a Page is preferable to uploading a file (like a Word or PDF document) since the end-user won't need to download anything to their computer to view the information - they just click the Page link and can read the information immediately in their browser.
Please see this Moodledocs page for detailed instructions:
https://docs.moodle.org/en/Page_resource