Attributes in Magento 2 plays a vital role and has great importance. However, the default Magento 2 attributes are not capable enough in satisfying the business requirements. In Magento 2 admin panel, you might have created a custom group and where you are required to add category attribute. In such case, you are required to implement a simple method to add category attribute to custom attribute group in Magento 2. Adding a custom group is crucial while developing a new module and required to customize any additional feature or functionality in your Magento 2 store. For example, let?s say while integrating a third-party API and using a category attribute.