Check out example codes for "use google font in html". It will help you in understanding the concepts better.

Code Example 1

Check out the font names and change 'finger paint' to another font name to how different google font appears on webpage.
<!DOCTYPE html>
<html>
<head>
<link href='https://fonts.googleapis.com/css?family=Finger Paint' rel='stylesheet'>
<style>
body {
    font-family: 'Finger Paint';font-size: 22px;
}
</style>
</head>
<body>

<h1>Finger Paint</h1>
<p>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</p>
<p>123456790</p>
<p>ABCDEFGHIJKLMNOPQRSTUVWXYZ</p>
<p>abcdefghijklmnopqrstuvwxyz</p>

</body>
</html>

Code Example 2

body {
    font-family: '*Insert google font';font-size: 22px;
}

Learn ReactJs, React Native from akashmittal.com