Deep linkingA link that points to a specific page or piece of content within a website, rather than just the homepage. Deep linking helps search engines understand the structure and content of a website.
Deep webThe part of the internet that is not indexed by search engines, including password-protected pages and unlinked content.
DensityThe frequency of a particular word or phrase in a body of text. Density is an important factor in search engine optimization.
Directory submissionThe process of submitting a website to an online directory in order to improve visibility and backlinks.
DomainThe name and address of a website on the internet, such as "example.com".
Domain ageThe length of time a domain has been registered and active. Domain age is an important factor in search engine ranking.
Domain authorityA measure of a website's overall quality and trustworthiness based on the number and quality of its backlinks and content.
Domain name system (DNS)The system used to translate domain names into IP addresses, allowing users to access websites using easy-to-remember names instead of numerical IP addresses.
Domain squattingThe practice of registering a domain name with the intent of profiting from the sale or use of the name by another party.
Doorway pageA low-quality web page that is created solely for the purpose of ranking high in search engine results for a particular keyword or query.
Duplicate contentContent that appears on multiple web pages within the same website or on different websites. Duplicate content can result in lower search engine rankings.
Duplicate content penaltyA penalty imposed by search engines for publishing duplicate content on multiple web pages, resulting in lower search engine rankings.
Dynamic contentWebsite content that changes based on user behavior or preferences, often used to improve user experience and engagement.