What is a URL, and how URL structure affects SEO
A URL (uniform resource locator) is a web page's address. Learn the parts of a URL and Google's advice for URL structure that helps SEO.
What is a URL? URL stands for uniform resource locator, and it is the address of a page on the web. Every page you visit, from a homepage to a single product, has one.
For SEO, the URL does two jobs: it tells Google where a page lives, and it gives people an idea of what to expect before they click.
The parts of a URL
Take this example:
https://www.example.com/blog/what-is-a-url?ref=newsletter
| Part | Example | What it does |
|---|---|---|
| Protocol | https:// | How the browser connects (https is encrypted) |
| Subdomain | www | An optional section of the domain |
| Domain | example.com | The site's name |
| Path | /blog/what-is-a-url | The specific page |
| Parameters | ?ref=newsletter | Extra information, often for tracking or filters |
Google's advice on URL structure
Google's guide to URL structure recommends a simple structure that helps both Google and people understand your site. The main points:
- Use readable words instead of long ID numbers where possible.
- Use words in your audience's language in the URL.
- Use hyphens to separate words. Google recommends hyphens instead of underscores.
- Use common encoding for parameters, such as an equal sign between a key and value and an ampersand between parameters.
Google's SEO Starter Guide adds that a URL with only random identifiers is less helpful for users.
What makes SEO friendly URLs
Our read, built on Google's guidance:
- Short and descriptive.
/services/seo-agencybeats/page?id=48213. - One idea per URL. The path should name the page's topic.
- Lowercase and consistent. Pick a pattern and keep it, so links and analytics stay clean.
- No dates unless the date matters. A dated URL makes an evergreen guide look old.
- Stable. Every URL change needs a permanent redirect, or old links and rankings break.
Should you change existing URLs?
Usually not for style alone. A working page with links and rankings is worth more than a prettier address. Change URLs when there is a real problem: duplicate addresses for the same page, a structure that confuses people, or a site move. When you do, set up a permanent (301) redirect from every old URL to its new one and update your internal links.
URL parameters and duplicate pages
Parameters for tracking, sorting or filtering can create many addresses for the same content. That splits signals and wastes crawling. Keep parameters consistent, link internally to the clean version, and make sure each page declares the version you want indexed.
Where URLs show up in search
Google shows your site name and a version of your URL with search results, so a readable path reassures people they are clicking the right thing. It is a small trust signal, but it is visible on every search.
Quick answers about URLs
Do keywords in the URL help rankings? Google recommends descriptive words because they help users and Google understand the page. Treat it as clarity, not a trick.
Hyphens or underscores? Hyphens. Google recommends them.
Does https matter? It encrypts the connection, and browsers warn people about sites without it.
The takeaway
A URL is a page's address and a small piece of its first impression. Keep new URLs short, readable and hyphenated, and change old ones only with redirects and a reason.
Sources
Checked October 3, 2026. Platforms change their guidance. The linked pages are the final word.
