The ultimate guide to HTTP status codes and headers for SEO

Do you understand how HTTP protocol works and the impact it has on crawling and indexing web pages? No? Here's a guide written by Contributor Barry Adams on HTTP status codes and headers that will make it easier to learn.

HTTP Status Codes: A Complete Guide of All HTTP Errors

Guide to HTTP Status Codes for SEO - Twaino

The Essential SEO Guide to HTTP Status Codes