Fast track your business to stronger marketing! Fill out our full discovery
Level343 LLC Logo, White Letter PNG
Grow Your SEO Knowledge

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)

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 optimizing for organic traffic or explaining analytics to a client, 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 a few new 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!

Recently Added Terms

AdSense

Google AdSense is an advertising platform that lets website owners make money by showing ads on their site. Learn how Google’s ad program pays publishers and when it’s commonly used on websites and content platforms.

Learn More »

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.

Learn More »

Backlinks

A backlink is a link from one website to another. It acts as a signal to search engines that other sites find your content valuable or trustworthy.

Learn More »

Most Searched Terms

Backlinks

A backlink is a link from one website to another. It acts as a signal to search engines that other sites find your content valuable or trustworthy.

Learn More »

AdSense

Google AdSense is an advertising platform that lets website owners make money by showing ads on their site. Learn how Google’s ad program pays publishers and when it’s commonly used on websites and content platforms.

Learn More »

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.

Learn More »

Get your 90-day SEO roadmap

Limited slots each quarter - Join 250+ brands who leveled up their marketing

Hello there! Please read to understand how we handle your privacy.

This website uses tracking cookies to help us understand how you use the site and improve upon your experience. We do not share any information collected – either personal or anonymous – with any other parties, with the exception of the reporting programs we use in conjunction with those cookies. By continuing to use this site, you agree to the use of these cookies. If you do not agree, please close the site.