For Laravel 5.xx
We can link favicon icon and css file in the following way. In Laravel application put your favicon icon and css file under the public folder. In my case, I put them public/css folder.
<link rel="shortcut icon" href="{{ asset('img/favicon.png') }}">
<link href="{{ asset('css/style.css') }}" rel="stylesheet">
For Laravel 6.00
<link rel="icon" href="{{ URL::asset('/css/favicon.jpg') }}" type="image/x-icon"/>
<link rel="stylesheet" type="text/css" href="{{ URL::asset('/css/app.css') }}">
For Laravel 8.00
<link rel="icon" href="{{ url('css/favicon.jpg') }}">
<link rel="stylesheet" type="text/css" href="{{ url('css/style.css') }}">