The product field is an optional input to configure for a credential. The field can be populated in 2 ways:
Automatically: once your credential is used with a template, the product field will be populated with the product aligned with that template. This allows easier access when using this product's templates in the future.
Manually: enter or update the aligned product for your credential. If the entered value matches the product name for a template, the credential will be suggested when using that product's templates.