What is drill down and slicing and dicing whats the difference between them? | Cognos

Drilling lets you quickly move from one level of detail to another to explore different aspects of your business. Drilling down moves you down in the hierarchy; drilling up moves you up in the hierarchy.
Slicing and Dicing:
While you can drill to look at information at any level, you can slice and dice to select the exact information you want in your report.