| return on ad spend | (ROAS) similar to ROI, ROAS shows how much return youre getting from an advertising investment. This helps online businesses evaluate which methods are working and how they can improve future advertising efforts. |
| meta-tags | A meta tag consists of meta keywords and a meta description. Meta tags are used to describe the content of a page and are included in the head element of your HTML structure. |
| key performance indicator | (KPI) A specific metric that shows whether a marketing initiative succeeds. For example, one KPI may be bounce rate (the percentage of visitors who leave after looking at only one page), and one could track this to determine how much interest a website is generating for first-time visitors. |
| crawl error | An error that occurs while a search engine is exploring your website. |
| keyword prominence | This refers to how important a keyword is to a web page. |
