so let's say there's a route called like, `about`

Then the URL is pretty easy: `https://mysite.com/about`

But let's say that in the route you want to also render `user` or `settings` depending on the user's actions

What does that URL look like?

`https://mysite.com/about/with/settings`
`https://mysite.com/about?settings`

Why I'm asking: 

`https://lego.com/manuals/23450.pdf` is a pretty logical URL and I can sort of _find_ things even if I don't know the exact URL. 

`https://github.com/{user}` 

As a user with AT, I kind of learn about the layout of the site from the URL; how will I do this with multiple "routes" per browser "page" ?

Acknowledging that state in URLs with query params is a thing so maybe it doesn't matter?

Like, this sort of URL exists: 
`https://www.youtube.com/watch?v=JGuUY7dZhWs&embeds_euri=https%3A%2F%2Ftwitter.com%2F&source_ve_path=MzY4NDIsMjg2NjY&feature=emb_logo`

or `https://www.google.com/search?q=router`

Maybe we want `https://mysite.com/about?w=settings&q=router`

```
mysite
-about
--our team
```

so say on the `about` page, we want to also show `settings` (or something), and then the user navigates to the nested "our team" page. What does the URL look like in this case?

`https://mysite.com/about/our-team`

`https://mysite.com/about/with/settings/our-team` <--this one doesn't feel like it makes sense
`https://mysite.com/about/`

I don't have an issue with like, query params or whatever (see https://codepen.io/melsumner/pen/ZYQGwa) 

If you delete the query param, you should get back what you were looking at before you changed anything
If it's like, a flyout then that should be a query param

Think about deep links in like .net: `https://learn.microsoft.com/en-us/microsoftteams/platform/concepts/build-and-test/deep-link-teams` 

Also, sitemaps: https://www.w3.org/TR/WCAG20-TECHS/G63.html and https://developers.google.com/search/docs/crawling-indexing/sitemaps/build-sitemap

But we made localization in URLs work pretty okay, e.g., `https://example.com/de-de/cats`

what happens if you visit `https://example.com/de-de` do you get an error or the index.html page?

so maybe `https://example.com/about/with/cats/settings` where `with` is similar to `de-de`