The relationship between Google and Wikipedia was collaborative in Wikipedia's early days, when Google helped reduce the pagerank of widespread, uneditable Wikipedia clones that were ostensibly ad farms.[citation needed] In 2007, Google introduced Knol, a direct competitor for community-driven encyclopedia creation, which was subsequently shut down in 2012. Google later supported Wikimedia with numerous grants, and came to rely on Wikipedia for addressing the problem of misinformation on YouTube, providing verifiable and well-sourced information to those seeking it. Google and Wikimedia Enterprise started a partnership in 2021.[1]