| extensible hypertext markup language | XHTML extends HTML to include XML formatting. |
| crawl page | Noun phrase. A document consisting of links to other pages, provided for the sole purpose of giving crawlers (robots) links to follow. Spammers used to submit these puppies to the search engines en masse. Maybe they still do. |
| clickstream data | A clickstream is a sequential path of pages taken by an Internet user. Clickstream data is the result of analyzing large batches of such clickstreams through data processing, cleaning and organizing. This data can be used to understand how people navigate websites and pages on the Internet. |
| google quality guidelines | Published guidelines from Google detailing tactics that are forbidden because they are malicious and/or intended to manipulate search results. |
| cart abandon rate | On ecommerce websites, the percentage of visitors who added a product to their cart and left the website before completing a purchase. |
