From Carleton Moodle Docs
A page resource creates a link to a screen that displays the content created by the teacher. The robust Text editor allows the page to display many different kinds of content such as plain text, images, audio, video, embedded code or a combination of all these. Watch this screencast for further instructions.
In certain cases it might be preferable to use the page resource instead of uploading a word-processed document, particularly if the document contains text that is just to be read and not downloaded.