Vendors of all stripes create a diverse range of software for large corporations. As a result, no single vendor is responsible for the entire process. To illustrate, imagine a telecom project in which one business handles invoicing, and another handles customer relationship management (CRM).
Data feeds from other companies can now be received by CRMs, for example, if a CRM needs billing information from another company. As a result, you can use the ETL method to load data from the feed.