Beginner’s guide to server response codes
Server response codes are an important aspect of understanding the information sharing process. Knowing each code’s appropriate use is a necessary skill, even if it’s not your role to configure the server itself.
Google Search Console: a complete overview
The Search Console (or Google Webmaster Tools as it used to be known) is a completely free and indispensably useful service offered by Google to all webmasters to help optimise their sites for search.