The words between the <WikiPages> </WikiPages> automatically get linked to a wiki page of that name. If there is not a page already created there it will appear as a red "future" link (or dangling link). This can also happen if the capitalization is off. The pages need to be in the format of AboutUs.org or Google.com to be properly linked (e.g. no "www", "http" or "/"s). This is how the Related Domains section will be formatted to link properly:

==Related Domains==
<WikiPages>
AboutUs.org
Google.com
</WikiPages>

The Related Domains area of each domain page uses this internal linking idea to create a "light rail" system which allows users to discover related sites. Ideally, each domain page would have somewhere between a few and no more than 30 related links.

If you have a site that is related to a given topic, feel free to add some related links from other site pages to your page. Please don't over do it, however. If you're adding more than 20 such links or you're putting up links on very popular and not directly related sites, then you're overdoing it and it will look like spam. Also linking to a high profile site is questionable.

(If you'd like to change the number of columns that appear in the "Related Domains" section for some reason you can change <WikiPages> to <WikiPages maxcols="2"> and leave the closing </WikiPages> the same.)