Whenever you receive a phone call from certain phone numbers, your phone won’t ring and you’ll instead get a silent notification telling you that Google is currently screening a phone call. There are four categories of calls you can screen up front: spam, “Possibly faked numbers” (presumably Google uses its fancy tech to figure this out), phone numbers that are calling you for the first time, and private or hidden numbers. For each of these categories, you can choose to either let them ring your phone (more on that option below) or screen the call and let Google automatically decline robocallers for you

Read the source article at wired.com