Informatica is a software tool designed to simplify Data Warehouse design and routine tasks related to
data transformation and migration i.e ETL -> Extract,transform and Load.
It is a visual interface and you will be dragging and dropping with the mouse in the Designer(client Application).This graphical approach to communicate with all major databases and can move/transform data between them. It can move huge bulk of data in a very effective way.
Informatica comes in different packages:
Informatica PowerCenter license - has all options, including distributed metadata, ability to organize repositories into a data mart domain and share metadata accross repositories.
PowerMart PowerMart - a limited license (all features except distributed metadata and multiple registered servers)Working
Working with Informatica:
Source database(s), target database(s), repository metadatabase
Client Software: Designer, Server Manager and Repository Manager.