google fonts

where do we add the goole font import in HTML ?
for example

<link href="https://fonts.googleapis.com/css?family=Courgette" rel="stylesheet">
would go in the html head section and then you would use
font-family: 'Courgette', cursive;
in css where you want to use the font, obviously this also applies to using the @import method as well, what i am stuck on is finding which file you add the HTML part to?

Thx in advance

its ok i worked it out!