Structured data as an advertising tool

Structured data is a standard vocabulary for stating what a page contains, in a form machines read without inference.

What it changes

Not position. Presentation. A result displaying a star rating, a price, opening hours or an expandable question set occupies more space and attracts more clicks than a plain link.

It also feeds the machine intermediaries that increasingly stand between a customer and a business. Explicit data is used with more confidence than data inferred from page text.

The six types that cover most businesses

Add BreadcrumbList for navigation context and Event where relevant. Beyond those, additional types produce diminishing returns for most businesses.

Accuracy is the constraint

Markup must describe what is actually on the page and visible to users. Marking up prices not shown, ratings not displayed, or questions not present is a policy violation and results in the markup being ignored or the site penalised.

Review markup in particular is tightly policed. Self-serving reviews, aggregated ratings not visible on the page, and marked-up ratings the business collected but does not display are all common violations.

Implementation

JSON-LD in a script tag is the preferred format and the easiest to maintain, because it sits separately from the page markup.

Generate it from the same source as the visible content wherever possible. Markup maintained separately from the page drifts out of sync within months, which produces exactly the inaccuracy that causes problems.

Testing

Validation tools exist for both syntax and eligibility. Test every template type once after implementation and again after any redesign.

The most common failures: missing required properties, dates in the wrong format, prices without a currency, and markup broken by a template change nobody checked.

The maintenance point

Structured data breaks silently. A redesign, a plugin update or a template change removes it, and nothing in the interface indicates a problem.

Check quarterly, on one page of each type. Five minutes, and it catches the failure that would otherwise persist for a year.

The connection to AI visibility

The same markup that improves search presentation gives machine intermediaries unambiguous facts about your business. That overlap means the work serves both purposes, which makes it one of the better-value technical investments available.