Salesforce Data Loader is an application that gives users the ability to export or import large amounts of data, typically as CSV files. With this feature, users can also update, edit, or delete records in Salesforce.’
Salesforce Data Loader is an excellent tool for importing and exporting data in bulk. As a result, there are many instances where an administrator might use the tool.
For instance, you might need to export backups of your data, load a large number of records in one go (with it, this can be up to 5 million), or save multiple mapping files for use at a later time.