Send the following on WhatsApp
Continue to ChatQuery : How to over ride a users cache when new assets / content are available Ive just run a google page speed test on my site and one of the things its suggested to do is use browser caching. https://vmapp.org/query/138234/How-To-Over-Ride-A-Users-Cache-When-New-Assets-Content-Are-Available-Ive-Just-Run-A-Google-Page-Speed-Test-On-My-Site-And-One-Of-The-Things-Its-Suggested-To-Do-Is-Use-Browser-Caching/