Pages store content and educational resources that are part of a course or group but don’t necessarily belong in an assignment. Pages can include text, video, and links to files and other course or group content. Pages can also be linked to other pages. They can also be used as a collaboration tool for course or group wikis where only specific users can have access. Canvas keeps the entire history of the page to account for changes over time.
From Canvas Basics Guide > What are Pages? | 