https://fonts.google.com/selection/embed
At head tag in html file:
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100..900;1,100..900&display=swap" rel="stylesheet">
declare the css style
h1 {
font-family: "Roboto", sans-serif;
}