[b]"What exactly do HTTP headers do, and why should I care?"[/b] or [b]"Can someone explain what HTTP headers do i

http headers do the behind-the-scenes work that makes the web functional. They’re like traffic signs—telling browsers and servers what to do next.

For example, `Set-Cookie` saves login info, and `Content-Encoding` shrinks files to load faster.

If you’re learning, https://httpbin.org/ lets you send test requests and see the headers come back. Super useful for testing.