By default, the Magento 2 allows storing the basic information about the customers in the backend. Sometimes, these basic details about the customers are not enough for your store and you may require to create custom customer attribute in Magento 2.However, the default configuration in the Magento 2 admin panel does not provide any such function to create ecustom attribute for customers. But, the store owners can create custom customer attributes in Magento 2 programmatically.The custom customer attributes in Magento 2 may help the store owners understand the customers in a better way. Some of the examples of the custom customer attributes in Magento 2 that you may require is the interest, hobbies, etc.I have provided a complete programmatic solution to do that. You can read the complete post at : https://meetanshi.com/blog/create-custom-customer-attribute-in-magento-2/