How does Google Maps know how heavy traffic is?

How does Google Maps know about all that traffic, huh? It's seriously creepy, but also, like, unbelievably helpful. I mean, it's constantly tracking my phone's location – which, yeah, is a little weird – and how fast I'm going. And apparently, if a bunch of us are all suddenly stuck in the same slow crawl, BAM! Red line of doom appears instantly, showing the backup. It’s like some kind of collective slowdown psychic visualization thing, and honestly, sometimes it feels a little invasive, you know? Like, is Big Brother really watching my every commute?

But then I get stuck behind that semi-truck that decided to take up the whole lane again, and I’m frantically checking Google Maps, desperately hoping for a better route… and it saves my bacon. Remember that time I was trying to get to the airport for that flight to see my Aunt Millie? Traffic was a nightmare, but Google Maps rerouted me through those backroads, completely avoiding the standstill on the highway. I barely made it, but I made it! Without Google Maps, I would’ve totally missed that flight. So yeah, it’s a little unnerving, all that location data, but I gotta admit… the convenience factor is pretty hard to beat. It’s like magic, or something.