HTTPS Strict Transport Security (HSTS)

HTTPS Strict Transport Security response header (or HSTS) tells browsers that a website should only be accessed via HTTPS and that all future traffic should be automatically converted to HTTPS. You can add the HSTS header to your site by adding some configuration to the sites .htaccess file, and we've found a site that will help you with what you need to put in there:

https://htaccessbook.com/important-security-headers/#hsts