Two Door Cinema Club is a Northern Irish indie rock band known for their song "What You Know," which is from their debut studio album Tourist History released in 2010. The song "What You Know" was released as a single on 7 February 2011 and is one of their most popular tracks. It was written by band members Alex Trimble, Kevin Baird, and Sam Halliday, and produced by Eliot James
. The song has a length of 3:09 and falls within the indie rock genre. It achieved chart success, peaking at number 64 on the UK Singles Chart and also charting in Australia, Scotland, and the US alternative charts. "What You Know" has been certified 3× Platinum in the UK and Gold in the US, reflecting strong sales
. The music video for "What You Know" features Spanish female dancers and was directed by Lope Serrano from the creative collective Canada. The video includes references to the band Blur's Country House video
. The song has been widely used in popular culture, including in Microsoft Outlook.com adverts in 2012, Telkomsel Loop TV commercials in Indonesia, and various international TV shows
. Additionally, there are remixes of the song, such as the Lost Kings remix, which has been well-received in the dance and EDM community
. In summary, "What You Know" is a signature song by Two Door Cinema Club that helped establish their presence in the indie music scene with notable commercial success and cultural impact
