At first give a name to your route and then use it in then use it in anchar tag
Route::get('/', function () {
return view('welcome');
})->name('welcome');
Route::get('/about', 'PagesController@about')->name('about');
Now you can use it in any page to refer them. like in contact page
<html>
..
....
<a href="{{route('welcome')}}">Home</a>
<a href="{{route('about')}}">About</a>