Googlefight is a now defunct website that outputs a comparison of the number of search results returned by Google for two queries, presented as the result of a fight. It is a project of Abondance, the company of Olivier Andrieu.
Between 15 and 27 June 2015, the website was updated to a new version, designed by Andrieu, which the About page stated was powered by Semrush and took into account Google search volume as well as the number of results returned.
The site also expanded in 2015 from French and English versions to 11 geographic versions, including German, Italian, Spanish, and Belgian.
The site is used for entertainment, for example comparing Microsoft and Google, with Google the winner. The results may be comforting, funny or self-referential. It has been used to check spellings. It can also be used as a measure of competitiveness; Salam Pax posted a Googlefight result between himself and Raed Jarrar on their blog in 2002, as their worldwide readership rose in the prelude to the 2003 invasion of Iraq.
Googlefight has been highlighted as an example of a site making money from contextual advertising, as well as one that derives its longevity from community participation (in this case, the always changing search terms).
Googlefight was originally designed by several friends (Sébastien, Frank and Olivier). This new version is conceived by Olivier.
I occasionally use Googlefight to check the more commonly used spelling of a word.