How to Properly Set and Modify Headers in Python Requests? or What Are the Best Practices for Handlin

Check if the site uses HTTPS and you're not mixing http/https links. Some servers reject requests if the `'Host'` header doesn’t match.

Also, `'Content-Type'` can mess things up if you’re doing POSTs.

For debugging, `httpbin.org/headers` shows what headers you’re actually sending. Super handy!