For years, Google Cloud has languished in third place in the cloud computing market, with fewer marquee customers to boast of than rivals Amazon Web Services and Microsoft. 

Last week, though, word surfaced of a buzzy new customer for Google Cloud—TikTok, the app for sharing short videos that is the year’s runaway social media hit. The deal is a lucrative one for Google Cloud, The Information has learned. In a three-year agreement signed in May 2019, TikTok committed to buying more than $800 million of cloud services from Google over that period, according to a person with direct knowledge of the matter.