laravel table migration error [easy to understand]

Illuminate\Database\QueryException : SQLSTATE[42000]: Syntax error oraccess violation: 1071 Specified key was too long; max key length is 767 bytes (SQL: alter table `users` add unique `users_email_unique`(`email`))at D:\WWW\test\vendor\laravel\framework\src\Illuminate\Database\Connection.php:664660| // If an exception occurs when attempting to run a query, we'll format the error661| // message to include the bindings with SQL, which will make this exception a662| // lot more helpful to the developer instead of just the database's errors.663| catch (Exception $e) {> 664| throw new QueryException(665| $query, $this->prepareBindings($bindings), $e666| );667| }668|Exception trace:1 PDOException::("SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes")D:\WWW\test\vendor\laravel\framework\src\Illuminate\Database\Connection.php:4582 PDOStatement::execute()D:\WWW\test\vendor\laravel\framework\src\Illuminate\Database\Connection.php:458Please use the argument -v to see more details.

use Illuminate\Support\Facades\Schema;/** * Boot any application service * * @return void */public function boot(){Schema::defaultStringLength(191);}