Structured data (Schema.org): the markup that makes your pages stand out

Structured data, or Schema.org markup, is invisible code that describes the content of your pages in a language search engines understand perfectly. Used well, it helps Google better grasp your business and can enrich how you appear in the results. Here's the essentials for a small business.

What structured data is

A web page is made for humans: machines have to infer its meaning. Structured data bridges that gap by explicitly labelling the elements — here's a business, its address, its phone; here's a review and its rating; here's a question and its answer. Google no longer has to guess.

This markup doesn't change how your page looks to the visitor: it's added in the code. But it can transform how you appear in search results, by making Google more confident about what you are and how relevant your pages are.

The most useful markup types for a small business

A few types cover most of a small business's needs. Organization or local-business markup specifies your name, contact details and service area. FAQ markup structures your questions and answers. Review markup displays your rating. Breadcrumb markup clarifies navigation.

Choose according to your reality: a clinic or a neighbourhood shop benefits mostly from local-business and review markup; a content-rich site benefits from article and FAQ markup. There's no need to mark up everything — a few relevant types, correctly implemented, are better.

How to implement it without breaking your site

Google's recommended format is JSON-LD: a block of code added to the page, independent of the visible content, so it's low-risk. It's the cleanest and easiest method to maintain. The mistake to avoid is marking up information that isn't actually present and visible on the page.

Rigour is essential: erroneous or misleading markup can be ignored, even penalized. Faithfully describe what the page contains, keep your contact details consistent with the rest of the web, and keep the markup up to date when your information changes.

Validating and tracking your rich results

Before publishing, test your markup with Google's validation tools: they flag errors and show whether the page is eligible for rich results. It's a quick step that saves hours of blind debugging.

Then monitor Search Console: it reports the structured-data types detected and any errors. Keep in mind, though, that rich results are a possibility, not a guarantee — Google decides to display them case by case, even when the markup is perfect.