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What is URL structure?
URL structure (Uniform Resource Locator) defines a web page's address and how it's organized. A URL has several components: protocol (https://), domain (vydera.com), path (/en/lab/), and optionally a page slug (/url-structure-seo). URL structure is a relevance signal for Google, a user experience factor, and an element important to stabilize over time: changing a URL without a 301 redirect loses all the link juice and traffic associated with the old address.
URL best practices in 2026
Principles that have remained stable for years:
- Short and readable: no unnecessary parameters, no random numbers, no superfluous stop words.
- Descriptive: a reader should understand the page's content from the URL.
- Lowercase: uppercase letters can create duplicates.
- Hyphens to separate words: Google recommends hyphens (-) rather than underscores (_).
- Contains the primary keyword: without over-optimization.
- Consistent structure: the hierarchy must reflect the site's architecture (domain > category > page).
What we observe at Vydera on problematic URLs
The most frequent URL problems in audits: URLs with dynamic parameters that get indexed (e.g., /product?id=4587&color=red), slugs in the wrong language on localized content, modified URLs without redirects during CMS migrations or redesigns. This last case is the most costly: all positions and backlinks pointing to old URLs are lost if redirects aren't properly set up.
URLs and multilingual structure
On a multilingual site, URLs must clearly indicate the language: subdomain (fr.vydera.com), subdirectory (/fr/, /en/), or separate domain. The subdirectory structure (/fr/, /en/) is generally preferred as it consolidates SEO authority on a single domain. hreflang tags complement this signal to tell Google which version to show to which user.
Sources and references
Go further
URL structure is systematically audited in our technical engagements. Find our analyses on Vydera Lab or contact us for a site architecture audit.
