| de-index | When Google removes a website or webpage, either temporarily or permanently, from search results, specifically its search index. Google provides a Remove URLs tool in the Search Console for voluntary cases; however, a website may also be de-indexed as punishment for violating Google’s Webmaster Guidelines, in the form of a manual action. |
| uniform resource identifier | a string of character used to identify a resource: most commonly on the internet. |
| server log files | Files generated by a server and which contain a list of activities by websites and services in it. |
| hreflang tags | HTML tags telling search engines there are international versions of your site, and which languages and countries your sites are intended for. |
| redirection | When a URL is moved from one location to another. Most often, redirection is permanent (301 redirect). |
