PHP Debug Bar is great & a must use package for any Laravel project - it makes optimization quick and easy! We use Debug Bar in all of our Laravel projects and it's of the packages that we install on all projects at the very start of development.

You can find the Debug Bar installation guide on github https://github.com/barryvdh/laravel-debugbar along with it's functionalities.

This plugin is only to be used in development environment, as it exposes project code and queries which should never be made public. To keep this simple, keep your ‘APP_DEBUG’ value as ‘false’ in your production (which is usually the case), as it is only enabled if the value is set to true.