Google Bomb

Before me telling what Google Bomb is try searching for miserable failure or failure and liar in Google. Got the answer? Those two are perfect examples of Google bombing. As you all know Google Search has a set of rules by which it ranks pages. So once you understand how these rules work, you can build pages that get better ranking for a particular keyword. The most important criterion for page ranking by Google is the number of pages that link to your page with that keyword. Now that you know this, you can increase the page rank of your webpage for a certain keyword, by increasing the number of links to your page with that keyword. The more the number of pages that link to you with the specific keyword the better the ranking.
The process of influencing Google’s ranking by flooding the pages on the net, with links to a particular page (with a certain keyword) is known as Google Bomb. Most of these Bombs are dropped for commercial reasons.