Add Expires Headers

Add Expires Headers

I use gtmetrix.com for doing performance tests on our websites. I ran one on the last site we created on Zoho Sites and although the PageSpeed test was excellent (92%), the YSlow test was poor (68%). In the YSlow report the three things that failed were Add Expires Headers, Use Cookie Free Domains, and use a CDN.

What can be done to improve these? I use GTMetrix for reports for my clients on site performance and do not want this to be an issue.

Here's their explanations for these items:

Add Expires headers

Expires headers let the browser know whether to serve a cached version of the page.

  • Reduce server load
  • Increase page load time
  • Cost benefit ratio: high value
  • Access needed

Use a Content Delivery Network (CDN)

CDNs can give an equally fast web experience to your users across the globe.


Use cookie-free domains

Serve static content from a different domain to avoid unnecessary cookie traffic.


Bruce Letterle
Red Lab Media

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