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SEO Dictionary & Marketing Glossary

Your quick-reference guide to SEO, analytics, and digital marketing. Browse alphabetically or search below for clear, plain-language definitions.

Currently featuring 160+ SEO terms (and growing)

Level343 / SEO Dictionary & Marketing Glossary

Understanding SEO starts with understanding the language. This glossary defines the key concepts, acronyms, and strategies marketers use to build visibility and measure performance.

Whether you’re an aspiring optimizer, a hands-on DIYer, or just trying to make sense of what your agency is saying, this glossary is your go-to guide. We’ve spent years building this collection, covering everything from SEO, social media, HTML and APIs to ISPs, CTAs, and WTFs. And now, with AI reshaping our digital assets, we’ve added even more entries.

So, if you’re diving into a marketing meeting or decoding jargon in a dev chat, keep our dictionary handy. Bookmark and return often, as we’re always adding entries!

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Recently Added Terms

.htaccess

.htaccess is a directory-level configuration file used by Apache web servers and compatible hosting environments. It can control behavior such as redirects, URL rewriting, access rules, caching, compression, and custom error handling.

Marketing Automation

Marketing automation is the use of software and rules to automate repetitive marketing activities and trigger communications or actions based on timing, audience data, or customer behavior.

E-A-T (Expertise, Authoritativeness, Trustworthiness)

E-A-T stands for Expertise, Authoritativeness, and Trustworthiness, an earlier Google Search Quality Rater Guidelines concept for evaluating content quality and credibility. In 2022, Google expanded it to E-E-A-T by adding Experience.

Most Searched Terms

Absolute Link

An absolute link is a hyperlink that includes the full URL, including the protocol (http/https) and domain (domain.com), which ensures the destination resolves to a specific location.

.htaccess

.htaccess is a directory-level configuration file used by Apache web servers and compatible hosting environments. It can control behavior such as redirects, URL rewriting, access rules, caching, compression, and custom error handling.

A/B Testing

A/B testing is a marketing method where two nearly identical versions of a webpage, email, or ad are shown to different audience segments.