Google, Facebook, TikTok and other Big Tech companies operating in Europe are facing one of the most far-reaching efforts to clean up what people encounter online. The first phase of the European Union's groundbreaking new digital rules will take effect this week. The Digital Services Act is part of a suite of tech-focused regulations crafted by the 27-nation bloc — long a global leader in cracking down on tech giants. The DSA, which the biggest platforms must start following Friday, is designed to keep users safe online and stop the spread of harmful content that's either illegal or violates a...