In the realm of web development and server-client communication, HTTP status codes are instrumental in conveying the outcome of a request. Among these, the 406 Not Acceptable and 409 Conflict status codes hold significance, both in terms of technical implications and their impact on SEO (Search Engine Optimization).
Let’s delve into what these status codes signify, their effects on SEO, and how to address them effectively.
What is a 406 Status Code?
The 406 Not Acceptable status code is returned by the server when the requested resource is capable of generating only response entities that have content characteristics that are not acceptable according to the “Accept” headers sent in the request.
In simpler terms, the server cannot provide content in a format acceptable to the client.
SEO Impact of 406 Status Code:
- Search engine crawlers interpret a 406 status code as an indication that the content on the webpage is not accessible or not available in a compatible format.
- This can negatively impact SEO rankings as search engines prioritize websites with accessible and compatible content.
How to Fix a 406 Status Code:
- Check Content Negotiation: Ensure that your server is capable of serving content in formats specified by the client’s “Accept” headers.
- Review Content Types: Verify that your website serves content in various formats such as HTML, JSON, XML, etc., to accommodate different client preferences.
- Implement Proper Error Handling: Customize error pages to provide helpful guidance to users and search engines encountering a 406 error.
What is a 409 Status Code?
The 409 Conflict status code indicates that the request could not be completed due to a conflict with the current state of the resource. This typically occurs in scenarios where the client’s request conflicts with server expectations or constraints.
SEO Impact of 409 Status Code:
- Search engines interpret a 409 status code as an indication of conflict or inconsistency within the website’s resources, potentially leading to a negative impact on SEO rankings.
- It can signal to search engines that the website may have issues with data integrity or concurrency management.
How to Fix a 409 Status Code:
- Resolve Resource Conflicts: Identify and address conflicts within the website’s resources, such as concurrent updates or versioning discrepancies.
- Implement Proper Error Handling: Provide clear error messages and guidance to users and search engines encountering a 409 error.
- Optimize Version Control: Utilize robust version control systems to manage resource conflicts effectively and prevent future occurrences.
Conclusion:
Understanding the implications of HTTP 406 and 409 status codes is crucial for maintaining a healthy website and preserving SEO rankings. By addressing these status codes promptly and effectively, web developers can ensure a seamless user experience and enhance their website’s visibility in search engine results.

EvenDigit
EvenDigit is an award-winning Digital Marketing agency, a brand owned by Softude (formerly Systematix Infotech) – A CMMI Level 5 Company. Softude creates leading-edge digital transformation solutions to help domain-leading businesses and innovative startups deliver to excel.
We are a team of 70+ enthusiastic millennials who are experienced, result-driven, and hard-wired digital marketers, and that collectively makes us EvenDigit. Read More