what to do after add Middleware in kernel.php code example

Example 1: middleware command in laravel

php artisan make:middleware NameOfTheMiddleware

Example 2: middleware in laravel

<?php

namespace App\Http\Middleware;

use Closure;

class CheckType
{
    public function handle($request, Closure $next)
    {
        // Perform action

        return $next($request);
    }
}