system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 What's the difference between page.site.com and site.com/page?

It seems like both are ways of having a sub-part of a website, but I'm not sure (from my non-web-savvy POV) what the difference is.
gpt
page.site.com is a subdomain. It acts like a top-level domain and can point to different web servers than other subdomains (for example, page1.site.com and page2.site.com can be on different servers).

site.com/page represents a directory (page) on the site.com server. So site.com/page1 and site.com/page2 are both on the same server, but are different directories.

You can think of site.com as being your house, page.site.com representing a specific computer in your house (called page), and site.com/page represents a specific folder (called page) on a computer. So if you have comp.site.com/page, you're requesting the page folder on the comp computer that is in the site house.