| cloaking | Showing different content to search engines than you show to human visitors. |
| broad match | A keyword option that allows your Google ad to appear when users search for variations of your primary keywords and related topics. |
| number of results | The amount of all search results in the search engine returned for a search query. |
| metadata | Internal words that are stored in the html of webpages and are not visible to users, but are noticed in by search engine crawlers. |
| x-robots-tag | Like meta robots tags, this tag provides crawlers instructions for how to crawl or index web page content. |
