A resource on your page is being served without a Cache-Control header. This means browsers don't know how long they can safely cache the resource, potentially leading to unnecessary re-downloads on subsequent visits. Proper cache headers are essential for optimal performance and reduced server load.
A static resource is being served without any caching directives, causing browsers to re-request it unnecessarily.
Configure your web server to send appropriate Cache-Control headers. For static assets that rarely change, use a long cache duration:
Cache-Control: public, max-age=31536000, immutableFor dynamic content, use shorter cache times:
Cache-Control: public, max-age=3600Proper cache headers allow browsers to store resources locally and serve them from cache on subsequent visits, dramatically reducing load times and server requests. This is fundamental for good web performance.
This issue can affect your site's search engine rankings and user experience. Addressing it promptly helps ensure optimal performance and visibility in search results.
Black SEO Analyzer automatically checks for this warning during site analysis, along with hundreds of other technical SEO issues.
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