Self Referential Associations in Rails - simpler than it sounds

Self-referential associations in Rails allow a model to reference itself, using a column in the same table to point to another record. This is useful for relationships like employee-manager or parent-child. To set it up, add a column to the model and specify the class_name and foreign_key in the association. This pattern is used in various scenarios, such as comment replies, user following, and categories with subcategories.