Two websites can show visitors the exact same information and still be understood completely differently by machines. One says “Dr. Leblanc, family law, 25 years in Montréal” in a nice paragraph and hopes Google figures out what kind of thing it is reading. The other says the same sentence to humans, and additionally hands machines a labelled fact sheet: this page describes a lawyer; her name is this; her field is family law; her office is at this address; her consultations start at this price.
That fact sheet is structured data. It rides invisibly inside the page’s code, written in a shared vocabulary that Google, Bing and AI systems all understand. Visitors never see it. Machines read it first.
Why guessing is the enemy
Machines reading ordinary text get things wrong more than you would hope. Is “Squalli” a person or a company? Is that number a price, a review count or a postal code? Does “Montréal” mean located in, serving, or merely mentioning? A human resolves these instantly from context. A machine assigns probabilities, and when it is not confident enough, it does the cautious thing: nothing. Your business becomes one of the millions of pages Google indexed but never quite understood, which caps how it can rank you and whether it can treat you as a solid entity at all.
Structured data replaces the machine’s guess with your declaration. It is the difference between hoping to be understood and filing the paperwork.
What it earns you, concretely
Richer search listings. The stars, prices, FAQ dropdowns and event details you see decorating some Google results come almost entirely from structured data. Those enhanced listings take more screen space and earn more clicks than the plain blue link beside them, at the same ranking position. The two upgrades most service sites should claim first, breadcrumb trails and review stars, have their own guide.
Eligibility, not decoration. Google only grants those enhancements to pages that declare the underlying facts properly. No declaration, no eligibility, regardless of how good the page is.
Legibility to AI assistants. When ChatGPT or Perplexity reads your site deciding whether you are a source it can trust, structured data is the one part of the page with no ambiguity in it. Machine-stated facts about services, prices and location give an assistant exactly the verifiable material it needs. This layer existed for a decade as a nice-to-have; AI search quietly promoted it.
What a service business should declare
The vocabulary covers thousands of thing-types, but a service firm needs a small, boring set done well: the business itself, with name, location, contact and hours. The person behind it, credentials included, since people hire people. Each service, with a description and, if you publish them, prices. Your FAQ, in question-and-answer form, which machines love because it maps one-to-one onto the questions real people ask assistants. Reviews, where you legitimately have them.
Done well means one more thing: the declared facts must match the visible page exactly. Declaring five stars you cannot show is the kind of thing Google penalizes, and honesty aside, it is just bad engineering.
The two-minute check
Google offers a free test at search.google.com/test/rich-results. Put in your homepage address. If it comes back empty, your site is making machines guess, and so are most of your competitors’ sites, which is precisely the opportunity. I have yet to audit a local service site where this layer was complete; most have none at all.
Every site I build at Studio Squalli ships with the full declaration layer as standard plumbing, because it costs little at build time and pays in both search listings and AI legibility for years. The free audit includes running your site through the test and telling you, in plain language, what machines currently understand about your business.