On 20 September 2016, an app went live in Beijing under the name A.me. Renamed Douyin that December, it became TikTok abroad after ByteDance bought the lip-sync platform Musical.ly for around a billion dollars in 2017 and merged the two. Ten years on, it has done more to reshape the internet than any competing service of its generation.
Its central innovation was not the vertical short video but the decision to abandon the social graph. Facebook and Instagram showed you what the people and pages you followed had posted; TikTok built an interest graph and perfected the "For You" page, ranking content by predicted appeal rather than by who made it. The system reads not just likes and shares but dwell time down to the millisecond, repeats and instant swipes — which is why accounts with zero followers can reach millions overnight.
The rest of the industry copied it almost wholesale. Instagram Reels, YouTube Shorts and Snapchat's short-video push replicated both the format and the recommendation logic. Meta, Google and Snap were reacting to a platform that had re-founded the global attention economy around them.
Ten years in, TikTok operates in three worlds. In China, Douyin remains the heavily censored, technologically elaborate original, run separately from TikTok. In the West, the company faced years of security-policy accusations — data flowing to Chinese authorities, the risk of political influence — all denied by Beijing's foreign ministry. In the United States, a long legal and political battle over a ban or forced sale ended in January 2026 with a joint-venture structure under majority American control. In Europe, the Digital Services Act has repeatedly put the platform under scrutiny over transparency and youth-protection failures, prompting localisation programmes such as Project Texas in the US and Project Clover in Ireland and Norway.
The business has also changed shape. TikTok Shop fused influencer marketing, live selling and one-tap in-app checkout into a marketplace that competes directly with Amazon for impulse purchases. The hashtag TikTokMadeMeBuyIt became shorthand for products — cosmetics, kitchen gadgets, books — selling out worldwide within hours because the algorithm lit up.
And for Generation Z it is now a search engine and a news source as much as an entertainment app: restaurant tips, fashion and explainers are looked up on TikTok rather than Google, while ARD's Tagesschau and ZDFheute rank among the most widely followed German-language news channels on the platform — a balancing act between journalistic standards and algorithmic dramaturgy.
The costs are contested. Psychologists and media educators warn about doomscrolling, sleep loss and the effect of beauty filters and algorithm-boosted diet trends on young people. TikTok has responded with default 60-minute daily screen limits for minors, pause reminders and filters that hide weight-loss content — measures critics call fig leaves, since they take a few taps to disable and leave the core principle of maximum dwell time untouched.
