Understanding the web,
in plain English.

A zero-click search occurs when Google answers a user's question directly on the search results page — in a featured snippet, a knowledge panel, a local pack, or a calculator — without the user needing to click through to any website. These results are drawn from pages Google deems most authoritative on the topic.

Z-index is a CSS property that controls the stacking order of overlapping HTML elements. Elements with a higher z-index appear on top of elements with a lower z-index. It is used to manage modals, drop-down menus, sticky headers, tooltips, and any situation where elements overlap on the page.

Zoning is the practice of dividing a webpage into clearly defined visual zones — hero, navigation, content, sidebar, CTA, footer — each with a distinct purpose and visual weight. Effective zoning guides a visitor's attention hierarchically toward the most important action on the page.

Zero-party data is information that a customer intentionally and proactively shares with a brand — through preference quizzes, surveys, account settings, or interactive tools. Unlike third-party data, it is accurate, consensual, and not subject to cookie restrictions or privacy regulations.

A catchment area (zone de chalandise) is the geographic territory from which a local business realistically draws its customers. In digital marketing, defining your catchment area informs your local SEO targeting, Google Ads radius settings, Google Business Profile service area, and the neighbourhoods or postcodes you should rank for in local search results.

A zombie page is a webpage that exists in a website's index but generates no organic traffic, has no backlinks, provides little unique value, and is rarely updated. These pages consume Google's crawl budget, dilute overall site quality signals, and can drag down the performance of other pages. Common examples include thin category pages, outdated blog posts, and duplicate location pages.