Hey , I have a doubt, how can i make my web page compatible with all devices?

Answer 1

If your definition of "compatible" equals to usability, then you'll be interested with the concept of Responsive Web Design (RWD).

It means the web content flows like fluid around its container (browser/viewport) without a predefined size constraint. 😉

Answer 2

<meta name="viewport" content="width=device-width, initial-scale=1">

Check this : https://www.w3schools.com/css/css_rwd_viewport.asp