Starting Friday, Europeans will see their online life change.

People in the 27-nation European Union can alter some of what shows up when they search, scroll and share on the biggest social media platforms like TikTok, Instagram and Facebook and other tech giants like Google and Amazon.

That’s because Big Tech companies, most headquartered in the U.S., are now subject to a pioneering new set of EU digital regulations. The Digital Services Act aims to protect European users when it comes to privacy, transparency and removal of harmful or illegal content.