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Introduction to Entity API in Drupal 8



Entity types in core come in two variants.
1 - Configuration Entity: Used by the Configuration System(configuration API) ,Configuration entities are stored within the common config database table as rows.
2 - Content Entity: Consist of configurable and base fields, and can have revisions and support translations. Content entities are stored within a custom database table as rows. The table name is the same as the content entity "id", and the columns are defined by the entity's "baseFieldDefinitions" method.

Reference : https://www.drupal.org/docs/8/api/entity-api/introduction-to-entity-api-in-drupal-8


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