What Exactly Do HTTP Headers Do and Why Should You Care? or Can Someone Explain What HTTP Headers Do

http headers do all the invisible work that makes the web function. they’re like the backstage crew at a concert.

for example, `Content-Length` says how big the response is, and `Referer` (yes, it’s misspelled) tells the server where u came from.

if u wanna see them in real time, use Postman or Burp Suite. or just F12 > Network tab in chrome.

fun fact: headers can even break your site if misconfigured. like `CORS` headers blocking API requests.