Microsoft's potential acquisition of TikTok's US operations is the latest twist in a rollercoaster two years for the short video app, which has come under growing scrutiny from overseas governments as its global popularity soars.
With TikTok, owner ByteDance became the first Chinese company to achieve global success with a consumer app. But amid rising US-China tensions, the White House has threatened to ban TikTok and other Chinese-owned apps, citing national security risks.
US President Donald Trump has now given ByteDance and Microsoft until September 15 to reach a deal. Microsoft is also looking to buy the app's Canadian, Australian, and New Zealand services.
2012 - ByteDance is founded by Zhang Yiming in Beijing.
2016 - ByteDance launches Douyin, the Chinese version of TikTok.
2017 - TikTok is launched. ByteDance acquires US video app Flipgram and lip-syncing app Musical.ly.
2018 - ByteDance integrates Musical.ly into TikTok. Indonesian authorities ban TikTok for containing “pornography, inappropriate content and blasphemy”. The ban is lifted a week later after TikTok agrees to remove “all negative content” from the app and open an office in Indonesia.
February 2019 - ByteDance agrees to pay a $5.7 million fine to the US Federal Trade Commission over Musical.ly's illegal collection of personal information from minors.
April 2019 - A court in the southern Indian state of Tamil Nadu asks the Indian federal government to ban downloads of TikTok, which it said encouraged pornography. A temporary ban lasts for two weeks.
Late 2019 - The Committee on Foreign Investment in the United States begins reviewing TikTok's purchase of Musical.ly.
April 2020 - TikTok hits 2 billion downloads globally.
May 2020 - TikTok appoints former Walt Disney streaming chief Kevin Mayer as its chief executive.
June 10, 2020 - European Union regulators begin to scrutinise TikTok's practices after the Netherlands' data protection commission decided to open an investigation into the company's policies to protect children's data.
June 29, 2020 - TikTok and dozens of other Chinese apps are banned by India with the government citing security concerns. The ban came after a deadly border conflict between India and China earlier in the month.
July 6, 2020 - When asked by Fox News if the United States was looking at potential TikTok ban, Secretary of State Mike Pompeo says: "we are taking this very seriously and we are certainly looking at it", adding that TikTok user data could end up "in the hands of the Chinese Communist Party".
July 7, 2020 - Trump suggests a TikTok ban could be deployed to punish China for the outbreak of the coronavirus.
July 20, 2020 - Australia is scrutinising TikTok for risks it may pose relating to potential foreign interference and data privacy issues, government sources tell Reuters.
July 29, 2020 - Lawmakers from Japan's ruling Liberal Democratic Party decide to urge the government to take steps to limit the use of TikTok, concerned that user data may end up in the hands of the Chinese government, public broadcaster NHK reports.
July 31, 2020 - Trump tells reporters he plans to ban TikTok in the United States within 24 hours.
August 2, 2020 - Microsoft announces it is exploring a purchase of TikTok's US, Canadian, Australian, and New Zealand services.
August 4, 2020 - Australia has found no evidence showing it should restrict TikTok, the country's Prime Minister Scott Morrison says.