The Insider Product Catalog Database is a central module that is a prerequisite for several key features, including Eureka, Smart Recommender, Segment Affinity, and Price Drop/Back in Stock ability within the Architect. It stores product data based on a specific schema composed of product attributes.
Insider allows you to define or customize this schema to align with your existing data and business objectives. Two types of product attributes are available to configure your product catalog: default and custom.
To have a better understanding of product attributes, you might find these articles helpful: