What Is a Ranking Factor?

Ranking factors determine your page's ranking in search results. Google's automated ranking systems weigh these signals for every query you type. Google has never published an official list; the three groups below are how SEO practitioners commonly sort the documented signals. The boundaries overlap, but the group still tells you where the fix lives.

The three types of ranking factors

Most factors sort into one of three buckets:

• On-page factors: quality content, keywords, and internal linking. You control these by editing your pages.
• Off-page factors: backlinks and the authority they build. Other sites generate these signals about yours.
• Technical factors: page speed, mobile usability, Core Web Vitals, and HTTPS. Your hosting and site setup control these.

Where the "200 ranking factors" number comes from

The "200 ranking factors" figure is SEO folklore, not a Google fact. Google described "more than 200 signals" years ago, but Google's John Mueller said in September 2021 that Google has "moved away from the 200 ranking signals number" because it's misleading. Google's current ranking systems guide says only that its systems look at "many factors and signals about hundreds of billions of web pages." There's no official list and no official count.

Confirmed factors vs. ranking myths

Google documents some factors openly: helpful, people-first content, links from other sites, mobile usability, and page experience signals such as Core Web Vitals and HTTPS. Other "factors" persist only because third-party tools publish scores. Domain authority is the clearest example. It's a Moz metric, and Mueller was blunt about it in 2019: "Google doesn't evaluate a site's authority." Schema markup is another. Google says structured data won't make your site rank better, though it does make pages eligible for rich results, which can lift click-through. Spend your effort on what Google actually measures.

How ranking factors work and why they change

Most SEO writing uses "ranking factor" and "ranking signal" interchangeably, and this page does too. Google itself rarely describes a fixed checklist of independent factors; its documentation describes ranking systems that evaluate many signals together.

Google generally ranks individual pages, while some site-wide signals and classifiers can affect those page-level results. The weight of each signal also depends on the query: Google's How Search Works page notes that freshness plays a bigger role for current news topics than for dictionary definitions. And the weights move over time. Google ships algorithm updates continually, including core updates several times a year, and its core updates documentation is clear that those broad changes "don't target specific sites or individual web pages." A page that slips after one usually hasn't broken a rule; the assessment around it changed.

How to improve your ranking factors

Triage before you tune. If Google can't crawl or index a page, flags a security issue, or your pages are unusable on phones, fix that first; those failures cap everything else, and Search Console reports most of them (our Google Search Console guide covers the setup). Once nothing is blocking you, invest in content that actually satisfies the query, the ongoing work that on-page SEO covers, along with earning backlinks. Then improve technical signals like Core Web Vitals where PageSpeed Insights shows real users are affected, and put your effort into confirmed factors before speculated ones.