The ‘meta’ includes everything from the tape on the camera mount bars, the reflective patterns on bollards, to the quality of the image encoding.
That, plus a subconscious ‘feel’ you start to develop goes a very very long way in a relatively short amount of time. I sometimes feel like I could tell I was in Singapore or not even if I was only allowed to look at my feet.
I got very good at it, but I lost my appetite for the game when Ukraine was invaded. Before that, I’d be joking about stuff like how the wooden window frames in Russia were much fancier and that’s how you could tell them apart.
Then again, some places are so far off into the bush that it takes some routine just to figure out which continent you’re on.
This is only partly true. It's true of ADW, the most popular community map, though it has over 50k locations. But the top players have played this map so much that some people do have some locations memorized (which is insane). Then there are a few countries or territories where the Street View coverage is so limited that you can basically memorize it, like Madagascar and Greenland.
There are enough locations & maps out there that the game isn't really about memorizing exact locations, though. But if you play a lot you do get good at "vibes" which is essentially pattern matching against other times you've played.
This is the kind of stuff that Geoguessr players call "meta" (or "metas").
I personally feel like it's more sporting to learn things like bollards, roadway markings, utility pole styles, and so on, which feel like they're about geography (observable differences in infrastructure or culture that persistently exist in different places), compared to things about Google Maps cars, imagery generations, glitches, redaction patterns, and so on, which feel more like they're about Google Maps itself (historical accidents of how and when the company mapped particular regions).
But if you play a lot or watch streamers talking about this stuff, there will be some kinds of metas that you can't unsee because they may just become obvious to you with time! I felt kind of bad about winning a Geoguessr duel earlier this week because I remembered a glitch meta that I had seen someone talking about on a stream... (you can see it instantly on Geotips if you click on Montenegro!).
Though it is hard to avoid accidentally learning some meta like the Kenya or Ghana cars.
https://www.youtube.com/watch?v=275VkeAlu90