1. How to change favicon in Velzon Laravel + Vue?

If you have .ico file then just replace in public/image/ eighter copy the icon and put the same location. and change the image name in resources/views/app.blade.php. like below.

<!-- App favicon -->
<link rel="shortcut icon" href="{{ URL::asset('image/favicon.ico') }}">

2. How to change application title?

If you want to change your application title just change in resources/js/app.js and resources/views/app.blade.php. That's it !