The European Commission has designated six of the largest tech companies on the planet as the “gatekeepers” of online services. You’ll know these names: Apple, Amazon, and Microsoft. Facebook parent Meta. Google and YouTube parent Alphabet. And, maybe you’re less familiar with this one: ByteDance, which owns TikTok. They’ve all got until March to comply with the continent’s new Digital Markets Act (DMA), which aims to give users more choice. For more, Marketplace’s Lily Jamali spoke with Sumit Sharma, a competition and antitrust senior researcher at Consumer Reports, who explained what the term “gatekeeper” refers to.