Your browser stores graphics and text as it displays them to you. This is called a cache (pronounced "cash").
Sometimes, data in the cache interferes with display a new version of a webpage. For example, a page in a Canvas course that has changed. Clearing your cache ensures that the new content of a webpage come right in to your browser for proper display.
The links below come from an excellent website: Refresh Your Cache
How to Clear Your Browser's Cache
Use the links below to see instructions for your browser:
Internet Explorer - Windows
Once you clear your browser's cache, be sure to refresh the page. This loads the latest version of the page.