Informatica PowerCenter allows users to extract data from multiple sources, transform it according to business logic, and load it into file and relational targets. It includes several key components like the Informatica domain, PowerCenter repository, PowerCenter Administrator, domain configuration, and Web Service Hub. The Informatica domain manages and administers PowerCenter. The PowerCenter repository stores instructions for extracting, transforming, and loading data. The PowerCenter Administrator is a web application for administering the domain and security. The Web Service Hub exposes PowerCenter functionality through web services.