Elyse Betters Picaro / ZDNET ZDNET’s key takeaways Google is implementing a new AI-powered age verification method.Machine learning will analyze your activity (mostly on YouTube) to guess your age.If AI guesses wrong, you’ll need to go through a verification process.A day after announcing AI-powered age verification on YouTube, which we explained in more detail yesterday, Google is launching it on a larger scale, and again it’s on you to sort out any problems if AI guesses wrong.Also: Google Chrome for iOS now lets you switch between personal and work accountsIn a post announcing “a safer online experience for US kids and teens,” Google says it’s introducing new technology to distinguish between older and younger users. This technology will analyze your online activity and make an attempt at guessing your age. If it thinks you’re under 18, your account will be restricted until you can prove you’re older. This process has been in testing in other markets, and Google says it worked well. How Google estimates your age Google says its age-estimation model uses machine learning to interpret “a variety of signals.” It notes that these signals are already associated with your account and that it’s not gathering any new information. These signals include the types of information you search for on YouTube, the categories of videos you watch, and the age of the account itself. Also: You can ask Gemini AI anything directly in Google Chrome – here’s how and why you shouldEven though the age restrictions apply to multiple Google products and services, it seems like YouTube is the only potential source of age information for now outside of how long ago you created your account. More