Originally Posted by
Kanath
Google is an extremely popular search engine where you can basically search for anything, and end up with (hopefully) some helpful results to different sites that might provide you with the answer/links to what you were searching for. Doing such search on google is often called "googling" someone or something, and is often referred to when simple questions, which could simply be "googled" to find an answer, are asked.
Here is a link to google:
As for the Warmaster Blackhorn heroic guide you were looking for, the guide morpheeus linked should be very helpful.