Mastering Tableau 2018.1, Second Edition 3.1: Data Preparation and Cleaning Data Sources with Dates and Numbers

The video tutorial covers data cleaning and preparation for visualization in Tableau. It starts with the importance of clean data, followed by filtering data by date, extracting specific date parts, and formatting dates. The tutorial also explains number formatting and conversion, and handling null values by replacing them with zeros.

What new insight or understanding did you gain from this video?