What Is YMYL? Google’s Definition, the Four Types of Harm and What Changed in 2025

Most people think YMYL means medical and financial sites. That was roughly true years ago. It is no longer how Google defines it.

The current definition is about consequences, not categories. A page about choosing a car seat, filing a complaint or voting by post can be held to the same standard as a page about medication, because getting it wrong can hurt someone.

Google’s definition

The working definition sits in section 2.3 of Google’s Search Quality Rater Guidelines, a public manual of about 180 pages whose current edition is dated 11 September 2025.

In Google’s framing, some topics carry a high risk of harm because content about them could significantly affect the health, financial stability or safety of people, or the welfare and well-being of society. The harm can fall on the reader, on people affected by what the reader does, or on society more widely.

The four types of harm

• Health or safety. Physical, mental and emotional health, and any form of safety, including safety online.
• Financial security. Anything that could damage someone’s ability to support themselves or their family, from investing and loans to legal matters with financial consequences.
• Government, civics and society. Topics that affect groups of people, public institutions and trust in them, now explicitly including election and voting information.
• Other. Topics that could hurt people or society in ways the first three do not cover.

Legal information has no category of its own. It falls under whichever kind of harm bad advice would cause, usually financial security and sometimes health or safety.

What changed in September 2025

The September 2025 edition renamed the society category to government, civics and society, and named election and voting information explicitly. In practice that means pages explaining how to register, where to vote or how elections work are now plainly within YMYL.

The same edition added guidance on rating AI Overviews. The direction is consistent: wherever wrong information can cause real harm, the bar goes up.

How the definition has evolved

• 2013: YMYL already appears in the rater guidelines.
• 2015: the guidelines describe YMYL pages as those that could affect a person’s future happiness, health or wealth, and list subject categories.
• 2022: the subject lists give way to types of harm, with a spectrum for deciding whether a topic qualifies.
• 2025: civics and elections are named explicitly.

One small change says a lot. Happiness dropped out of the definition and society came in. The concept moved from personal well-being toward measurable harm, to individuals and to the public.

Is your topic YMYL?

The guidelines suggest one question: could significant harm result if the information were wrong or the advice were poor? Topics then fall somewhere on a spectrum.

Clearly YMYL	May be YMYL	Unlikely to be YMYL
How much of a medicine is safe for a child	Which running shoes suit a beginner	The history of a band
What to do after a car accident	Choosing a travel credit card	How to repot a houseplant
How to register to vote	Reviews of a local restaurant	Film release dates

The middle column is where judgement matters. A topic is not YMYL just because it touches health or money. Casual, low-stakes questions people happily ask friends usually are not. Advice someone might act on, with real consequences, usually is.

One topic, three pages

Take back pain, and three pages a site might publish about it.

• Stretches to ease lower back pain, written by a physiotherapist. Clearly YMYL, because a wrong movement could cause injury. It meets the standard if the author’s qualifications are visible, the advice is cautious and readers are told when to see a professional.
• A personal account of recovering from a slipped disc. Valuable first-hand experience that a textbook cannot offer. It stays trustworthy by describing one person’s journey rather than prescribing treatment to everyone.
• A review of office chairs for people with back pain. Toward the middle of the spectrum. It is judged mostly as a review, on genuine testing and honest comparison, with care not to promise medical benefits.

Same subject, three different standards. The question is always what could go wrong if a reader acted on the page.

What YMYL means for ranking

YMYL is a rater guideline concept, not a ranking system. There is no YMYL score and no YMYL penalty. What Google has said is that for these topics its automated systems give even more weight to content showing strong experience, expertise, authoritativeness and trust.

Several of the systems in Google’s ranking guide do that work, notably its reliable information systems, covered in Google’s ranking systems explained. Raters themselves do not set rankings, as explained in do Google quality raters affect your rankings.

YMYL pages and YMYL sites

YMYL applies to topics and pages, not only to whole sites. A cooking blog that publishes one article on supplement doses has one YMYL page, and that page is held to the higher standard.

The risk is that one weak YMYL page can colour how a site is seen, because Google also uses site-wide signals. If you cannot support a high-stakes topic with real expertise, it is often wiser not to cover it at all.

If you publish YMYL content

• Name the author and any reviewer, with qualifications a reader can verify.
• Cite primary sources, such as official guidance, regulators and peer-reviewed research.
• Show when it was written and last reviewed, and review it when the facts change.
• Make it clear who runs the site and how to contact them.
• Stay within your expertise. General information is very different from personal advice.

Experience still counts. Someone describing life with a condition offers something a textbook cannot. But for dosage, diagnosis or legal rights, readers need expertise as well as experience. How to score your own pages is covered in the E-E-A-T scoring rubric.

Five questions before you publish

• Who on the team is qualified to write or review this? If nobody, consider not publishing it.
• What is the worst realistic outcome if a reader follows the advice and it is wrong?
• Would a professional in the field be comfortable reading it with your name attached?
• Is every figure, rule and recommendation current, with the date it was checked?
• Does the page point readers to official sources for decisions that depend on their own circumstances?

If any answer makes you hesitate, fix that before you publish. On YMYL topics, a page that is not yet ready does less harm unpublished.

Common misunderstandings

• “YMYL only means health and finance.” Safety, legal matters and civic information are all included.
• “Being YMYL is a penalty.” It raises the standard; it does not lower your rankings by itself.
• “Small sites cannot rank for YMYL topics.” They can, when the expertise and trust are real and visible.
• “An author box solves it.” A name without verifiable expertise does nothing, and an invented one is now described by Google as deceptive.

If a YMYL site has already lost ground after an update, the recovery process is covered in YMYL site recovery.

The Google systems that put extra weight on trust for these topics are covered in reliable information and crisis systems.

The August 2018 core update was nicknamed Medic because health sites moved most, though Google said it was not aimed at them. See what the Medic update really was.