Even if temporary, the unprecedented shutdown of TikTok will have an impact on U.S.-China relations, domestic politics, the social-media marketplace and millions of Americans who depend on the app.

Millions of TikTok users in the United States are no longer able to watch videos on the social media platform as a federal ban on the immensely popular app takes effect. The company's app was removed Saturday evening from prominent app stores,

The app started halting service Saturday night for 170 million users in its most important market.