A Google bomb (google bombing )or Google wash is an attempt to determinative the ranking of a website. “Google bombs” is the best aggregate efforts to link to a website with a key phrase and artificially elevate an online site within the Google search results for that search phrase.
Google Bombing is one of the best SEO techniques used by spammers to build backlink in bulk with a one anchor text and its not related to the subject matter of relevant website involved web site so as to get top positions on the search engine result pages (SERP).