This document discusses the differences between Gutenberg blocks and templates, custom post types (CPTs), and advanced custom fields (ACFs) in WordPress. It provides examples of using CPTs and ACFs to build a real estate website and discusses how that could be translated to using Gutenberg blocks and templates instead. It also gives examples of how CPTs might differ for an IMDB-style website for movies, TV shows, and people. The key difference is that CPTs and ACFs require changing the template to display the data on the front-end, while Gutenberg blocks display content without storing custom data in the database.