Data is integral to Eleventy sites, and the data cascade is a powerful tool for architecting your site — and yet, it might not always be clear where to put your data, and the relationship that data has to other data in your project. I spoke at Eleventy's data cascade at the Eleventy Meetup: check out Journey to the Center of the Data Cascade.
https://www.youtube.com/watch?v=Nv5i_nuZOqw