The relationship between Google and Wikipedia was originally collaborative in Wikipedia's early days, when Google helped reduce the pagerank of widespread uneditable Wikipedia clones that were simply ad farms. In 2007, Google introduced Knol, a direct competitor for community-driven encyclopedia creation. Later it supported Wikimedia with grants and came to rely on Wikipedia to address the spread of misinformation on YouTube, providing verifiable and well-sourced information to those seeking it. Google and Wikimedia enterprise started a partnership in 2021.
In 2008, various news sources reported that most of Wikipedia's traffic came from referrals from Google search.
In February 2010. Google gave US$2,000,000 as its first grant to the Wikimedia Foundation. Google founder Sergey Brin commented that "Wikipedia is one of the greatest triumphs of the internet".
In May 2012, Google added a project called the Google Knowledge Graph, which produced knowledge panels alongside traditional search engine results. Later, results from querying the knowledge graph complemented string-based search in producing the ranked list of search results as well. A large amount of the information presented in the knowledge panel infoboxes is retrieved from Wikipedia, Wikidata, and the CIA World Factbook.