The European Commission "found that TikTok does not provide the necessary information about the content of the advertisements, the users targeted by the ads, and who paid for the advertisements", it said in a statement.
It is the first time Brussels has formally accused TikTok of breaching the Digital Services Act (DSA), the EU's landmark online content law.
"In our preliminary view, TikTok is not complying with the DSA in key areas of its advertisement repository, preventing the full inspection of the risks brought about by its advertising and targeting systems," the EU's digital chief, Henna Virkkunen, said.
TikTok said it was reviewing the commission's findings and remained "committed" to complying with the DSA.
"We disagree with some of the commission's interpretations and note that guidance is being delivered via preliminary findings rather than clear, public guidelines," a TikTok spokesperson said.
Under the DSA, the world's largest digital companies must establish an advertisement library that shows information about the adverts that run on their platforms.
The EU hopes that any ads library is then easily accessible to researchers and civil society to detect scam adverts and hybrid threat campaigns.
AzVision.az
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