Google has updated its guidelines on faceted navigation by turning an old blog post into an official help document.
What started as a blog post in 2014 is now official technical documentation.
This change reflects the complexity of ecommerce and content-heavy websites, as many sites adopt advanced filtering systems for larger catalogs.
Faceted Navigation Issues
Ever used filters on an e-commerce site to narrow down products by size, color, and price?
That’s faceted navigation – the system allowing users to refine search results using multiple filters simultaneously.
While this feature is vital for users, it can create challenges for search engines, prompting Google to release new official documentation on managing these systems.
Modern Challenges
The challenge with faceted navigation lies in the mathematics of combinations: each additional filter option multiplies the potential URLs a search engine might need to crawl.
For example, a simple product page with options for size (5 choices), color (10 choices), and price range (6 ranges) could generate 300 unique URLs – for just one product.
According to Google Analyst Gary Illyes, this multiplication effect makes faceted navigation the leading cause of overcrawling issues reported by website owners.
The impact includes:
- Wasting Server Resources: Many websites use too much computing power on unnecessary URL combinations.
- Inefficient Crawl Budget: Crawlers may take longer to find important new content because they are busy with faceted navigation.
- Weakening SEO Performance: Having several URLs for the same content can hurt a website’s SEO.
What’s Changed?
The new guidance is similar to the 2014 blog post, but it includes some important updates:
- Focus on Performance: Google now clearly warns about the costs of using computing resources.
- Clear Implementation Options: The documentation gives straightforward paths for different types of websites.
- Updated Technical Recommendations: Suggestions now account for single-page applications and modern SEO practices.
Implementation Guide
For SEO professionals managing sites with faceted navigation, Google now recommends a two-track approach:
Non-Critical Facets:
- Block via robots.txt
- Use URL fragments (#)
- Implement consistent rel=”nofollow” attributes
Business-Critical Facets:
- Maintain standardized parameter formats
- Implement proper 404 handling
- Use strategic canonical tags
Looking Ahead
This documentation update suggests Google is preparing for increasingly complex website architectures.
SEO teams should evaluate their current faceted navigation against these guidelines to ensure optimal crawling efficiency and indexing performance.
Featured Image: Shutterstock/kenchiro168
