In the ninth episode of "Relax with Excel," the podcast covers creating dropdown lists in Excel. Dropdown lists streamline data entry, enhance efficiency, and prevent invalid entries, ensuring uniformity in large datasets. The episode walks through a step-by-step process for creating a dropdown list using fruit names as an example. It involves entering data, selecting a cell for the list, using the 'Data Validation' tool, specifying the data source, and finalizing the list. This tutorial is designed to be easy to follow, whether listeners are actively learning or falling asleep.