HSTS - Browser HTTPS Only
The HTTP Strict-Transport-Security response header (often abbreviated as HSTS) lets a web site tell browsers that it should only be accessed using HTTPS, instead of using HTTP {if val2}for domain and subdomains{endif}<break>{if val3} browsers will never connect to your domain using an insecure connection. While the service is hosted by Google{endif}<break>{if val1}for {val1} seconds{endif}