You can create the name of the Webpage by clicking the edit icon and filling out the empty box with the appropriate name that you want.
For the URL, it has to have a forward slash ( /) and has to have a name. It’s not recommended to adjust the homepage though if you are making a folder because you need the page at that specific location to be able to access everything or to at least have something to land on when people go to it first.
All urls should be lowercase and have no spaces, search engines will look at different case of page names and consider these to be different pages, which is why we always make them lowercase. We don't use spaces because browsers translates spaces to %20 which looks terrible. E.g. https://mywebsite.com/home%20page, so we use hyphens, like this - so the page url is readable https://mywebsite.com/home-page.
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