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Marketing & Advertising Glossary

From CPM to programmatic, every term in advertising and media buying explained in plain English.

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HTTP/2 vs HTTP/3

Landing Pages

HTTP/2 and HTTP/3 are protocols that govern how browsers load web pages. HTTP/3 is faster and more reliable, especially on mobile and unstable connections.

Hashtag Strategy

Social Media

A planned approach to selecting and deploying hashtags across social media campaigns to improve discoverability, reach, and audience engagement.

Header Bidding

Buying

A programmatic advertising technique where publishers offer ad inventory to multiple demand sources simultaneously before making server-side decisions, increasi

Headless CMS

WordPress

A CMS architecture that separates content management from presentation, allowing content to be delivered across multiple channels and devices independently.

Helpful Content System

Answer Engine Optimisation

Google's framework for evaluating content quality based on helpfulness, experience, and relevance. Critical for AEO success and search visibility.

Hero Image

Campaign Artwork

A large, visually dominant image used as the primary focal point in digital and print campaigns to immediately capture audience attention.

Hi-Res PDF/X-1a

Print & Publishing

A standardized PDF format designed for high-quality print production, ensuring colour accuracy and reliable file handoff between agencies and printers.

Holdout Group

Attribution

A control group excluded from a marketing campaign to measure its true incremental impact by comparing their behaviour against exposed audiences.

Hook Rate

Social Media

The percentage of viewers who watch the first 3 seconds of a video before scrolling past. A critical metric for social media performance.

Host-Read Ad

Podcasts

An ad read by a podcast host in their own voice during the show, creating authentic endorsement that feels like a personal recommendation to listeners.

Hreflang Tags

Technical SEO

HTML tags that tell search engines which language version of a page to display to users in different regions or speaking different languages.

Hub & Spoke Model (Content)

Blog Content

A content distribution strategy where a central hub of pillar content branches into multiple spoke pieces targeting specific audiences or channels across your m

Hugging Face

AI

Hugging Face is an open-source AI platform providing pre-built language models and tools for natural language processing tasks in marketing applications.

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