# Glossary

Short definitions of the website, search, and advertising terms used across the Learning Center, each linked to the guides that use it.

- Canonical URL: https://movermarketing.ai/learn/glossary
- Learning Center: https://movermarketing.ai/learn

## Articles

- [What is a 301 redirect?](https://movermarketing.ai/learn/glossary/301-redirect) — [Markdown](https://movermarketing.ai/learn/glossary/301-redirect.md): A 301 redirect is a permanent server response that sends visitors and search engines from an old URL to a new one, and Google treats it as a signal that the new URL should be the one shown in search results.
- [What is a canonical tag?](https://movermarketing.ai/learn/glossary/canonical-tag) — [Markdown](https://movermarketing.ai/learn/glossary/canonical-tag.md): A canonical tag is a link element, rel="canonical", that tells search engines which URL is the preferred version of a page when the same content is available at more than one address.
- [What is clickthrough rate (CTR)?](https://movermarketing.ai/learn/glossary/clickthrough-rate) — [Markdown](https://movermarketing.ai/learn/glossary/clickthrough-rate.md): Clickthrough rate (CTR) is the share of people who click an ad or search result after seeing it, calculated as clicks divided by impressions.
- [What is a GCLID?](https://movermarketing.ai/learn/glossary/gclid) — [Markdown](https://movermarketing.ai/learn/glossary/gclid.md): A GCLID (Google Click Identifier) is a parameter Google Ads adds to the landing page URL of each ad click when auto-tagging is on, used to track conversions and match offline sales back to the click.
- [What is Google Search Console?](https://movermarketing.ai/learn/glossary/google-search-console) — [Markdown](https://movermarketing.ai/learn/glossary/google-search-console.md): Google Search Console is a free Google tool that shows how a website appears in Google Search, including the searches that show it, clicks, indexing problems, and links from other sites.
- [What is noindex?](https://movermarketing.ai/learn/glossary/noindex) — [Markdown](https://movermarketing.ai/learn/glossary/noindex.md): Noindex is a rule, set in a robots meta tag or an HTTP header, that tells Google to drop a page from its search results even if other sites link to it.
- [What is robots.txt?](https://movermarketing.ai/learn/glossary/robots-txt) — [Markdown](https://movermarketing.ai/learn/glossary/robots-txt.md): Robots.txt is a text file at the root of a website that tells crawlers which URLs they may visit, and Google says it manages crawling but doesn't keep a page out of search results.
- [What is an XML sitemap?](https://movermarketing.ai/learn/glossary/xml-sitemap) — [Markdown](https://movermarketing.ai/learn/glossary/xml-sitemap.md): An XML sitemap is a file that lists a website's important pages so search engines can find and crawl them more efficiently, though Google says listing a page doesn't guarantee it will be indexed.