Can TikTok conquer the American shopper?

News Snapshot:

TikTok really wants me to buy a hairbrush. This past week, one popular influencer repeatedly tried to sell me what she called “the viral TikTok brush” as part of a paid advertising campaign. I also noticed smaller creators hawking it with a label explaining that they’d be paid a commission on any sales as part of a new affiliate marketing program. Sure, why not? Influencers sell random stuff on social media all the time. But when I opened up TikTok Shop, the new feature on the popular app, the brush was everywhere. I mean, really everywhere. Each row or two...