URL structure affects how Google understands and ranks your pages. Bryan Collins explains what makes an SEO-friendly URL and how to structure your site's URLs correctly.
URL structure refers to how the addresses of your website pages are organized and formatted. Well-structured URLs help Google understand your site hierarchy, signal relevance, and make a better impression on users in search results.
After 30 years in SEO, URL structure decisions made at site launch are some of the most permanent — changing them later requires 301 redirects and risks ranking disruptions. Here’s everything you need to know.
What Makes an SEO-Friendly URL
Google has published clear guidelines on URL best practices. The core principle: URLs should be readable, descriptive, and organized logically.
Good URL: example.com/services/hvac-repair/
Poor URL: example.com/page?id=47&category=3&ref=home
The good URL tells both Google and users exactly what the page is about before they click. The poor URL provides no information.
The Components of a URL
Understanding URL anatomy helps you optimize each component:
https://example.com/blog/what-is-seo/
- Protocol:
https://— always use HTTPS, never HTTP - Domain:
example.com— your domain name - Path/directory:
/blog/— the folder structure - Slug:
what-is-seo/— the specific page identifier
Each component matters for SEO and usability.
URL Slug Best Practices
The slug is the most frequently optimized URL component.
Include your primary keyword:
/blog/local-seo-for-plumbers/ — targets “local SEO for plumbers”
Use hyphens between words (not underscores, not spaces):
✅ /what-is-seo/
❌ /what_is_seo/
❌ /what%20is%20seo/
Google treats hyphens as word separators and underscores as word joiners — meaning what_is_seo is read as one word, not three.
Use lowercase only:
✅ /local-seo-for-plumbers/
❌ /Local-SEO-For-Plumbers/
Mixed case can create duplicate content issues — some servers treat /About/ and /about/ as different pages.
Keep it short and descriptive:
✅ /blog/seo-for-plumbers/
❌ /blog/the-ultimate-complete-guide-to-local-seo-for-plumbers-in-new-jersey-2024/
Remove stop words (a, the, and, of, in, for) unless they’re needed for clarity or the keyword includes them.
Be specific:
✅ /services/hvac-repair/ — clearly describes the page
❌ /services/service1/ — meaningless
URL Structure for Different Page Types
Homepage
example.com/ — root URL, no additional path needed
Service Pages
example.com/services/hvac-repair/
example.com/services/ac-installation/
Create a logical /services/ directory that contains individual service pages. This signals to Google that these pages belong to a services section.
Location Pages
example.com/hvac-repair-edison-nj/
or
example.com/locations/edison-nj/
For service-area businesses targeting multiple cities, location-specific pages should have the city in the URL to signal geographic relevance.
Blog/Content Pages
example.com/blog/how-to-choose-an-hvac-contractor/
Blog articles get their keyword-focused slug. Keep blog directory structure consistent — all articles under /blog/.
About and Contact Pages
example.com/about/
example.com/contact/
Simple, generic paths for utility pages. No need for keywords in these.
Flat vs. Deep URL Structure
Flat structure (2–3 levels maximum):
example.com/
example.com/services/
example.com/services/hvac-repair/
example.com/blog/
example.com/blog/article-slug/
Deep structure (too many levels):
example.com/
example.com/categories/
example.com/categories/hvac/
example.com/categories/hvac/services/
example.com/categories/hvac/services/repair/
example.com/categories/hvac/services/repair/air-conditioning/
Prefer flat structure. Every additional level makes pages harder for Google to crawl (deeper pages get less crawl priority) and dilutes internal link equity. Pages within 3 clicks from the homepage consistently rank better than pages buried 6–8 levels deep.
Should URLs Include Dates?
For evergreen content (guides, service pages, how-to articles that remain relevant indefinitely) — avoid dates in URLs.
/blog/2024/05/what-is-seo/ becomes outdated-looking as years pass. A searcher seeing this URL in 2026 might assume it’s out of date and choose a more recent-seeming result. You can update the content without the URL reflecting the original publish date.
For news articles where publication date is genuinely relevant (timely events, regulatory changes) — dates in URLs are acceptable.
URL Parameters: Avoid Where Possible
URL parameters look like: example.com/products?sort=price&color=blue&size=medium
These are generated dynamically by many e-commerce platforms and CMS systems. Problems with parameter URLs:
- They create multiple URLs for the same or similar content (duplicate content)
- They’re difficult to read and share
- They can multiply indexable URLs exponentially (e.g., 10 filters × 10 colors = 100 parameter combinations for the same base page)
Solutions:
- Use canonical tags on parameter URLs to consolidate signals
- Configure Google Search Console’s URL Parameters setting (if applicable)
- Ask your developer to generate clean URLs instead of parameters
Changing URLs on an Existing Site
URL changes after launch require 301 redirects from old URLs to new ones. Without 301s, any links or rankings built on the old URL don’t transfer.
Before changing any URL:
- Document all current URLs (Screaming Frog crawl)
- Map every old URL to its new URL (one-to-one redirect map)
- Implement 301 redirects before making pages live
- Submit new sitemap to Google Search Console
- Monitor for 404 errors in GSC after the change
Changing URL structure without a complete redirect map is one of the most common causes of traffic loss during site redesigns.
Frequently Asked Questions
What is URL structure in SEO? URL structure refers to how the addresses of your website pages are organized and formatted. An SEO-friendly URL structure uses readable words (not numbers or codes) to describe the page content, is logically organized to reflect site hierarchy, and is consistent across all pages on the site.
Does URL structure affect SEO rankings? URL structure is a minor Google ranking signal — they use URLs to understand page content. Keywords in the URL slug provide a weak relevance signal. However, URL structure’s bigger SEO impact is on click-through rate: clean, descriptive URLs in search results are more likely to be clicked than cryptic parameter-filled URLs.
What is a URL slug? A URL slug is the portion of a URL that identifies a specific page, typically the last segment after the final slash. In ‘example.com/blog/what-is-seo/’, the slug is ‘what-is-seo’. Slugs should be short, descriptive, include the primary keyword, use hyphens between words, and be lowercase.
Should URLs include dates? Including dates in URLs is generally not recommended for evergreen content. Dated URLs make content appear outdated as years pass, can affect CTR, and make URL restructuring more complex. For news articles where publication date is relevant, dated URLs are acceptable. For evergreen guides and service pages, avoid dates in URLs.
What is the best URL structure for a local business? For local business websites: homepage at /, services at /services/ with individual service pages at /services/[service-name]/, blog at /blog/ with articles at /blog/[article-slug]/, location pages at /[city]-[service]/ or /locations/[city]/. Keep the structure flat (2–3 levels maximum) and logical.
Should I use hyphens or underscores in URLs? Use hyphens (-) to separate words in URLs, not underscores (_). Google treats hyphens as word separators (so ‘what-is-seo’ is read as three separate words) but treats underscores as word joiners (so ‘what_is_seo’ is read as one word). This is a long-standing Google recommendation documented in Google’s URL guidelines.
How long should a URL be? URLs should be as short as possible while remaining descriptive. Aim for URLs under 75 characters total. Remove stop words (a, the, and, of, in) from slugs unless they’re needed for readability. Shorter URLs are also easier to copy and share.
Bryan Collins is an SEO consultant based in Piscataway, NJ, with 30+ years of experience helping small businesses grow through content and search. He is a U.S. Marine Corps veteran and the author of Why Your Website Isn’t Ringing.