1. SEO: Search Engine Optimization. This is the practice of improving the visibility and ranking of a website on search engines like Google.

2. SERP: Search Engine Results Page. This is the page that displays the results of a search query on a search engine.

3. Keyword: A word or phrase that people type into a search engine to find information.

4. Ranking: The position of a website on a search engine results page for a specific keyword.

5. Backlink: A link from one website to another website. Backlinks are important for SEO as they signal to search engines that other websites find your content valuable.

6. On-page SEO: This involves optimizing elements on a website to improve its ranking on search engines, such as title tags, meta descriptions, and content.

7. Off-page SEO: This involves optimizing elements outside of a website to improve its ranking on search engines, such as backlinks and social media mentions.

8. Meta description: A brief summary of the content on a web page that appears in search engine results.

9. Title tag: The title of a web page that appears in search engine results and on the top of a browser tab.

10. KPI: Key Performance Indicator. This is a measurable value that helps businesses track their progress towards achieving their goals. In SEO, KPIs could include metrics like website traffic, conversion rates, and backlink quality.