First of all I am a Drupal beginner.

I need to implement a reward points functionality on a Drupal 7 website. A user is given points by performing certain actions such as user registration, when the user makes a booking through the system or when the user refers the website to other friends.

My question is when the administrator wants to know what are the users' reward points. How can I do this? Is it through a custom module and using a costume template (tpl.php)?

Thanks.