| delinking | See Link Removal. |
| hummingbird | Hummingbird is a Google search algorithm, first announced August 2013. Hummingbird was aimed at understanding the concepts behind keywords. |
| rich results test tool | A tool released by Google in January 2019 allows users to preview how rich results will be shown in search results and edit code. |
| blog comment spam | comments that are left on a blog that add no value to the article or discussion, typically including a backlink to an external website. Blog comment spam may be automated by a bot or left manually. |
| bots | Also known as crawlers or spiders, these are what scour the Internet to find content. |
