| crawl errors | Crawl errors are errors that occur during the crawling process by a search engine bot or other crawler. Errors could include DNS errors, server connectivity issues, or errors caused by the unavailability of a resource such as the Robots.txt file. |
| ip address | An internet protocol (IP) address is a string of numbers thats unique to each specific website. We assign domain names to IP addresses because theyre easier for humans to remember (ex: moz.com) but the internet needs these numbers to find websites. |
| opt-in | Marketing initiatives in which a user chooses to participate. For example, an opt-in newsletter requires the user to input an email address in order to opt-in and receive the newsletter. |
| bing | The name of Microsoft’s search engine. Bing launched in June 2009, replacing Microsoft Live Search (previously MSN Search and Windows Live Search). Since 2010, Bing has powered Yahoo’s organic search results as part of a search deal Microsoft and Yahoo struck in July 2009. |
| conversion rate optimization | (CRO): The process of improving the number or quality of conversions that occur on a website. Some popular CRO tactics include testing changes to website design, copy, images, price, call-to-action, and messaging. |
