• The justices will consider whether the law that would effectively ban TikTok in the U.S. violates the U.S. Constitution's free speech protections.
• It's unclear when the court will hand down a decision, and if China's ByteDance continues to refuse to divest TikTok to an American company, it faces a complete ban nationwide.
• The law in question would impose harsh civil penalties for app "entities" that continue to carry TikTok after Jan.19.

The Supreme Court on Friday will hear oral arguments in the case involving the future of TikTok in the U.S., which could ban the popular app as soon as next week.

The justices will consider whether the Protecting Americans from Foreign Adversary Controlled Applications Act, the law that targets TikTok's ban and imposes harsh civil penalties for app "entities" that continue to carry the service after Jan.19, violates the U.S. Constitution's free speech protections.

It's unclear when the court will hand down a decision, and if China's ByteDance continues to refuse to divest TikTok to an American company, it faces a complete ban nationwide.

What will change about the user experience?

The roughly 115 million U.S. TikTok monthly active users could face a range of scenarios depending on when the Supreme Court hands down a decision.

If no word comes before the law takes effect on Jan. 19 and the ban goes through, it's possible that users would still be able to post or engage with the app if they already have it downloaded. However, those users would likely be unable to update or redownload the app after that date, multiple legal experts said.

Thousands of short-form video creators who generate income from TikTok through ad revenue, paid partnerships, merchandise and more will likely need to transition their businesses to other platforms, like YouTube or Instagram.

"Shutting down TikTok, even for a single day, would be a big deal, not just for people who create content on TikTok, but everyone who shares or views content," said George Wang, a staff attorney at the Knight First Amendment Institute who helped write the institute's amicus briefs on the case. 

"It sets a really dangerous precedent for how we regulate speech online," Wang said.

Who supports and opposes the ban?

Dozens of high-profile amicus briefs from organizations, members of Congress and President-elect Donald Trump were filed supporting both the government and ByteDance.

The government, led by Attorney General Merrick Garland, alleges that until ByteDance divests TikTok, the app remains a "powerful tool for espionage" and a "potent weapon for covert influence operations."

Trump's brief did not voice support for either side, but it did ask the court to oppose banning the platform and allow him to find a political resolution that allows the service to continue while addressing national security concerns. 

The short-form video app played a notable role in both Trump and Democratic nominee Kamala Harris' presidential campaigns in 2024, and it's one of the most common news sources for younger voters.

In a September Truth Social post, Trump wrote in all caps Americans who want to save TikTok should vote for him. The post was quoted in his amicus brief. 

What comes next?

It's unclear when the Supreme Court will issue its ruling, but the case's expedited hearing has some predicting that the court could issue a quick ruling. 

The case will have "enormous implications" since TikTok's user base in the U.S. is so large, said Erwin Chemerinsky, dean of Berkeley Law. 

"It's unprecedented for the government to prohibit platforms for speech, especially one so many people use," Chemerinsky said. "Ultimately, this is a tension between free speech issues on the one hand and claims of national security on the other."

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