For a business's marketing, operations, and order management, customer data management is essential.
You can easily import a CSV file with a list of customers into your Magento 2 store, for example, if you are transitioning your business from offline to online and have gathered all the information on your frequent customers.
Additionally, exporting the file is a simple process if you want to make an excel file with the list of clients.
The merchant can import & export customers Magento 2 using basic settings.
For a step-by-step guide, Visit: https://meetanshi.com/blog/import-and-export-customers-in-magento-2/