Compatibility means that the presentation is based not only on a particular platform, a specific browser and its capabilities, but granted a widest access.
At the same time, this means that the page should adhere to the prevailing standards and not exclusively to the special commands of a specific browser.
A good website includes a linking of texts on the Internet and explains terms.
To refer to the own pages is just as important to grant access to the pages, so that they can be registered there as the automatic search engines to make it possible for other sites.