How to use the Vary HTTP header and why you need it
What is the HTTP Vary header used for?
Often, HTTP Vary is used to detect compressed and uncompressed data when dynamically displaying pages. In this case, accept-encoding is used. If the user's browser is not able to process Gzip-compressed content, information is sent in an uncompressed form. This is necessary to improve the appearance of the pages and the content contained on them.
User-agent helps not only to distinguish content versions but also to quickly recognize information by search bots. So Vary header can be partially considered an SEO optimization tool, but you should not specifically configure it for bot recognition.
The most common problems with Vary HTTP
Conclusion
This article is a part of Serpstat's Checklist tool

Try Checklist now |
Speed up your search marketing growth with Serpstat!
Keyword and backlink opportunities, competitors' online strategy, daily rankings and SEO-related issues.
A pack of tools for reducing your time on SEO tasks.
Cases, life hacks, researches, and useful articles
Don’t you have time to follow the news? No worries! Our editor will choose articles that will definitely help you with your work. Join our cozy community :)
By clicking the button, you agree to our privacy policy.