Learning D3.JS 5.0 10.4: Make It More Functional

This video tutorial guides viewers through adding capital cities and population indicators to a map using JSON files. It covers creating city circles, styling them, and adding functionality for a better user experience. The tutorial concludes with a summary of the process and a preview of the next video.

How does the population affect the size of the circles on the map?

What additional functionalities were added to improve user experience according to the text?