KNOWLEDGE BASE

SEO & AI Glossary

Master the language of modern search. From technical SEO to the latest in Generative AI.

H

HTTPS and SSL/TLS

The encrypted version of HTTP that secures data in transit between browser and server — a confirmed Google ranking signal since 2014.

READ FULL ARTICLE
H

Hallucination

When an AI language model confidently generates factually incorrect, fabricated, or unsupported information that sounds plausible but is false.

READ FULL ARTICLE
H

Hashtag Strategy

A deliberate approach to selecting and using hashtags on social media posts to maximise discoverability and audience reach.

READ FULL ARTICLE
H

Headless CMS

A content management system that stores and delivers content via API, decoupling the content backend from the presentation layer.

READ FULL ARTICLE
H

Heat Map

A data visualisation that shows where users click, move, or scroll on a web page, using colour gradients to indicate engagement intensity.

READ FULL ARTICLE
H

Heat Maps

Visual data tools that display user interaction patterns on a webpage — where users click, scroll, and focus attention — using colour-coded frequency visualisations.

READ FULL ARTICLE
H

Helpful Content Update

A Google algorithm update and ongoing system introduced in 2022 that penalises content created primarily for search engines rather than to genuinely help users.

READ FULL ARTICLE
H

Hreflang

An HTML attribute that tells search engines which language and region a page is intended for, enabling correct targeting for international websites.

READ FULL ARTICLE
H

Hyperlocal SEO

SEO optimisation targeting searches in a very specific geographic area — a neighbourhood, street, or city district — typically for businesses serving that micro-area.

READ FULL ARTICLE
I

Ideal Customer Profile

A detailed description of the type of company or individual that would gain maximum value from your product and provide maximum value in return.

READ FULL ARTICLE
I

Image Compression

Reducing the file size of images through lossy or lossless compression algorithms — one of the highest-impact page speed optimisations for image-heavy websites.

READ FULL ARTICLE
I

Image Recognition

AI technology that identifies and classifies objects, scenes, and content within digital images.

READ FULL ARTICLE
I

Image SEO

Optimising images on a website for search engine understanding, faster loading, and visibility in image search results.

READ FULL ARTICLE
I

Impression Share

A Google Ads metric showing the percentage of eligible impressions your ads actually received versus the total available impressions.

READ FULL ARTICLE
I

Impressions

The number of times a URL, ad, or piece of content is displayed to a user — in search results, on social media feeds, or in ad placements — regardless of whether it is clicked.

READ FULL ARTICLE
I

Inbound Marketing

A strategy that attracts customers by creating valuable content and experiences tailored to them, rather than interrupting them with outbound messages.

READ FULL ARTICLE
I

Incrementality Testing

An experimental methodology that measures the true causal impact of a marketing activity by comparing a treated group against a control group that did not receive the activity.

READ FULL ARTICLE
I

Index Bloat

When a website has a disproportionately large number of low-quality, duplicate, or unnecessary pages indexed by Google — wasting crawl budget and diluting site quality signals.

READ FULL ARTICLE
I

Index Coverage

The Google Search Console report showing which pages on a site are indexed by Google and which are excluded—with reasons for exclusion.

READ FULL ARTICLE
I

Indexability

The ability of a web page to be stored in a search engine's index and considered for ranking in search results.

READ FULL ARTICLE