ETL: Extract, Transform, Load

ETL is a comprehensive data extraction used to consolidate data from multiple sources into a single, unified view and has 3 steps: 

• Extract: Data is retrieved from various sources, including databases, web services, and files. 
• Transform: Data is cleaned, transformed, and formatted to meet specific requirements. 
• Load: The processed data is loaded into a target system, such as a data warehouse. 

It is a comprehensive and reliable data repository for business intelligence and analytics.