What Creates The Skill/Knowledge Gaps Between The GeoGuessr Ranks?

In an attempt to help myself and others know what to prioritize when climbing the GeoGuessr ranks, I'd like to collect some data about what (generally) creates the gaps that separate players of different skill levels in order to create a general "path of progression"-style infographic that includes the most valuable things to learn within each rank from Bronze-Masters.

(I'm excluding Champion and higher elo tiers since creating a useful guide/overview of what could improve on would probably have to be incredibly specific and extensive, and even if I was able to create one, collecting data for what to include would be too much work.)

I'd be grateful for anything you can contribute with in the survey: https://forms.gle/rdX9STWGmYsSW47R7

Why? Climbing the ranks in GeoGuessr means that you're not only getting better at the game, but also that you know more about the world. In my opinion, this is what makes improving at GeoGuessr so appealing. However, unlike in other games, relying solely on playing vanilla game modes is far from the most efficient way to improve and can only take you so far. This is probably a big reason why the community is so passionate and has created/shared an insane amount of resources. Of course, this is greatly appreciated as a new player; however, even with compiled knowledge hubs like Plonk It and practice tools like Learnable Meta Maps, I can't help but feel overwhelmed and not know where to start. The fact that questions like "What do I learn next?" and "What can I do to improve?" seem to be repeatedly asked on r/GeoGuessr from people of various skill levels (at least around master and below), tells me I'm not alone and that an overview similar to what I'm describing above could be helpful to many.

Full disclosure: I'm rather new to the community, and although I've not seen anything like what I'm planning to create, I'm aware that something similar might already be out there. If so, I'd happy to know where to find it and not "have to" continue this project :)

If you have any other thoughts and/or feedback, please let me know in the comments!