what is route model binding in laravel code example

Example 1: set route name laravel

Route::get('/novanoticia', 'HomeController@getNovaNoticia')->name('route_name');
Route::get('/novanoticia', ['as' => 'route_name', 'uses' => 'HomeController@getNovaNoticia']);

Example 2: laravel model bind with route in model

/**
 * Retrieve the model for a bound value.
 *
 * @param  mixed  $value
 * @param  string|null  $field
 * @return \Illuminate\Database\Eloquent\Model|null
 */
public function resolveRouteBinding($value, $field = null)
{
    return $this->where('name', $value)->firstOrFail();
}

Example 3: laravel route model binding

Route::bind('user', function($value)
{
    return User::where('name', $value)->first();
});

// We can And Do also this in model..

/**
 * Retrieve the model for a bound value.
 *
 * @param  mixed  $value
 * @param  string|null  $field
 * @return \Illuminate\Database\Eloquent\Model|null
 */
public function resolveRouteBinding($value, $field = null)
{
    return $this->where('name', $value)->firstOrFail();
}