Do Hyphens Affect SEO?

A client asked in March why his new URL read like one long jammed-together word. No hyphens anywhere in it. Do hyphens affect SEO enough to explain a ranking gap on their own? Not directly, no. Google confirmed that years ago. What hyphens actually change sits somewhere else entirely, and most site owners never look there.

Rankings didn’t move once the URL got fixed that month. Something else did, though. Click-through rate ticked up almost immediately. That gap between the two outcomes is the whole answer here, and it takes a bit of unpacking.

What a Hyphen Actually Does in a URL

Word separators. That’s the entire job. /best-running-shoes-calgary reads as four distinct words to a crawler. Strip the hyphens and it becomes /bestrunningshoescalgary, one unbroken string a machine has to guess at.

Google’s crawlers still parse the smashed-together version, most of the time. Search engines have improved at this over the years. Guessing still costs something, though. Clarity is never guaranteed the way it is with clean word breaks.

Humans read the smashed version worse than machines do. A search result showing bestrunningshoescalgary.com looks like a typo or a scam link. Hyphenated, the same URL reads instantly. That difference shapes click-through rate before a visitor ever loads the page.

Hyphens vs Underscores: The Real Difference

Older CMS platforms leaned on underscores by default. Some of those legacy sites still land on our desk unchanged. Hyphens over underscores. That’s been Google’s own documented recommendation for more than a decade now.

The reason comes down to how a crawler reads whitespace. A hyphen acts as a genuine word break. An underscore does not, technically. It looks like one to a human eye, though. Take best_running_shoes as an example. One glued token, not three separate words, is what it renders as in some parsing contexts. Underscore handling has improved. Slowly, and not evenly across every search engine’s crawler. Better still isn’t equal. Hyphens cost nothing extra to implement, so there’s no real upside left in picking the weaker option.

We standardize every new client build on hyphens. No exceptions, no debate needed on this one.

Do Hyphens in a Keyword Change What Ranks

Here’s where it gets more interesting than the URL question. A hyphen inside a word can shift its actual meaning, and that shift changes what shows up in search results entirely.

Take “reform” against “re-form.” Google returns almost entirely different top results for each one. One means political or organizational change. The other means putting something back together physically. Same letters, different hyphen placement, different search intent behind the query.

That distinction matters more in keyword research than most guides mention. Search volume for a hyphenated variant can run completely separate from its unhyphenated twin. Treating them as interchangeable during keyword research misses real volume sitting on the table.

Most everyday keywords don’t carry this ambiguity. Worth checking anyway before locking a content plan around a term with a hyphen in it.

When Hyphens Turn Into a Problem

Too many hyphens, and the benefit flips entirely. best-cheap-running-shoes-store-near-me-calgary-alberta reads as spam before a human even finishes the sentence. An overuse pattern worth avoiding, and Google’s own guidelines call it out specifically.

Five or six words in a slug is a reasonable ceiling for most pages. Beyond that, a URL starts working against the exact clarity hyphens were supposed to add.

Domain names carry a slightly different rule. A hyphenated domain still functions technically fine. It just looks less trustworthy, and typed traffic drops because callers misdial or forget where the hyphen goes. We steer new domain registrations away from hyphens entirely, even when the clean version costs more upfront.

How We Structure URLs on Client Sites

SEO Company To-The-TOP! sets URL conventions during the first website audit on every new engagement. Lowercase only. Hyphens between words. Target keyword near the front of the slug, not buried at the end.

One Calgary client’s product pages carried underscores site-wide from a 2016 platform migration nobody had cleaned up. Fixing five hundred URLs meant five hundred 301 redirects, done carefully over three weeks to avoid an equity drop. Rankings held steady through the change. Crawl efficiency improved within the following month, based on Search Console data pulled after the fact.

Landing pages built for Google Ads management campaigns get the same treatment, hyphens and all. A clean slug helps Quality Score indirectly, through the same readability signal that helps organic results.

The Practical Answer

Hyphens themselves carry no ranking weight. Google has said this plainly, more than once.

Readability. Crawl clarity. Click-through rate. Occasionally search intent itself, when a hyphen changes a word’s meaning. That’s the real layer hyphens influence, one step beneath rankings. Get URL structure right during a Calgary SEO build. The question stops mattering once the habit is already baked in.

Search engines reward clarity, not punctuation. Worth fixing on an old site. Not worth an emergency migration on its own.

Frequently Asked Questions

Do hyphens in a URL directly boost Google rankings?

No. Google has confirmed hyphens carry no direct ranking weight on their own. They help readability instead. Crawl clarity improves too. Click-through rate often follows once a URL reads clearly to a human.

Hyphens or underscores in a new URL, which one wins?

Hyphens, every time. Google’s own documentation recommends them over underscores. A hyphen reads as a genuine word break to a crawler. An underscore does not always parse the same way.

Can a hyphen change what a keyword actually means?

Yes, occasionally. “Reform” and “re-form” pull almost entirely different search results. The hyphen shifts intent. Spelling alone never explains that gap. Worth checking before building content around an ambiguous term.

How many hyphens are too many in one URL?

Five or six words is a reasonable ceiling for most slugs. Past that point, a URL starts reading as spam rather than a clear description. Google’s guidelines flag excessive hyphenation directly.