Page manager allows you to collect and manage contextual information in a flexible and consistent way. It is an important part of building infrastructure on Drupal websites, and you should know how to use this module. This screencast series is targeted at experienced Drupal site builders. The series starts by covering the basic concepts used in Page manager, then it introduces you to Panels and Views to focus on the great integration of these tools.
If you need to brush up on Views, you can watch our Intro to Views for Drupal 7 series.