When a website visitor finds something interesting on your website they may bookmark it for future reference. When they want to refer to your website later, they click on that bookmark. If the bookmark brings them back to the place they were interested in, you are on your way to a satisfied customer.

A bookmark saves only the URL they used to reach that page (the URL is visible in the location window at the top of the browser). Some website designs do not provide enough information in the URL of an internal page to recreate that page from a bookmark. If your website does this, returning visitors will find their bookmarks don't work and they will be frustrated. This is often a problem on websites that implement frames, JavaScript or databases incorrectly.

You can test your website by visiting an internal page of the site with your browser and bookmarking it. Then kill the browser program (click the box in the upper right corner of the browser window) and restart it. Now use the bookmark and see whether it takes you back to the former page.