what is use of pluck method in laravel code example

Example 1: pluck array in laravel

$users = User::all()->pluck('field_name');
//for keys instead of [User::all()->pluck('id');] use
$user_ids = User::all()->modelKeys();

Example 2: laravel array_pluck

$array = array_pluck($array, 'developer.name', 'developer.id');

// [1 => 'Taylor', 2 => 'Abigail'];