When importing data, Data Loader reads, extracts, and loads data from comma-separated values (CSV) files or from a database connection. It Used to insert, update, delete, or export Salesforce records. Data Loader is a client application for the bulk import or export of data. Salesforce is using a tool for managing data called the data loader. In data management there are two process first called the upsert ( it is the combination of update and insert mean insert + Update are make the upsert) second is the undelete( it is the combination of merge and update means we add update + merge). Data Performing Operation on bulk record as like Insert,Update, Delete and export in data management. That provide bulk data that’s the reason data management are necessary in Salesforce. Data Management In Salesforce-: Data management is the process of collecting, keeping, and using data securely.