My experience with Google fonts was flawless until I decided to import the W3.css file into my project. Despite trying to rearrange the order by shifting the Google fonts link to the beginning of the document, they would not display properly. The issue resolved itself once I removed the link to the W3.css file.
Here is where Google fonts were working:
<head>
<link href="https://fonts.googleapis.com/css?family=Concert+One"rel="stylesheet">
</head>
And here is where Google fonts were not working:
<head>
<link href="https://fonts.googleapis.com/css?family=Concert+One"rel="stylesheet">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
</head>