Entity API

In Drupal 11, bundle and content type are related but distinct concepts:

Content Type vs Bundle

Content Type is a specific type of bundle used for Node entities only. When you create a content type like “Article” or “Page” in the Drupal UI, you’re creating a bundle of the Node entity type.

Bundle is the broader, more generic term that applies across all fieldable entity types in Drupal. It’s a subtype or variation of an entity type that can have its own set of fields.