PySpark and AWS: Master Big Data with PySpark and AWS - Project (UDF and WithColumn)

The video tutorial explains how to create and use a User Defined Function (UDF) to increase the salary of employees over the age of 45 by $500. It covers the steps to define the UDF, implement the logic to check the age condition, register the UDF, and apply it to a data frame to update the salary column. The tutorial emphasizes the importance of running the cell after modifications to ensure changes are applied.

What is the significance of the 'width column notation' in updating salaries?

How does the function handle the return type for the salary increment?

What steps are necessary to ensure that changes made in the data frame are reflected in the notebook?