This Bulk REST API allows you to quickly load your organization's data into Salesforce and is optimized for loading or deleting large sets of data. You can use it to query, insert, update, upsert, or delete many records asynchronously by submitting batches. The function is available if you have the Bulk API feature enabled. This feature is enabled by default for Performance, Unlimited, Enterprise, and Developer Editions. Salesforce is a customer relationship management services company.