Google says it is best not to use a 403 server status code and if you are, to switch it to use a 404 server status code instead. Google's John Mueller said on Twitter that a 403 is "weird" but it ...

Google's Search Relations team shares which HTTP status codes matter most for SEO. Learn how redirects, 1xx codes, and network errors impact your site's performance. Google only cares if redirects are ...

Google’s John Mueller recently explained that HTTP status codes are the first thing Google checks when crawling content. This topic came up during the Google Webmaster Central Hangout on October 18.