A static resource on your page (like a CSS file or an image) is being served with a very short cache lifetime. This means that returning visitors have to re-download the file even if it hasn't changed. Setting a long cache time for static assets is a fundamental performance optimization.
A CSS file is being served with a `Cache-Control: max-age=600` header (10 minutes).
Configure your server to send a `Cache-Control` header with a long `max-age` value (e.g., one year) for static assets that don't change often. Use a cache-busting technique (like adding a hash to the filename) to force a re-download when the file does change.
Cache-Control: public, max-age=31536000, immutableEffective caching dramatically speeds up page loads for repeat visitors, as their browser can serve files from its local cache instead of making a network request. This improves user experience and reduces load on your server.
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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