The European Union’s Digital Services Act (DSA) has officially gone into effect. The DSA carves out additional rules for what it considers “very large online platforms,” forcing them to give users the right to opt out of recommendation systems and profiling, share key data with researchers and authorities, cooperate with crisis response requirements, and perform external and independent auditing. It will also create an archive of targeted advertisements it shows in the EU and will give European Snapchat users over the age of 18 more control over the ads they see