# Explaining the Gibbs Sampler

This short article by George Casella and Edward George, explains the nuts and bolts of a Gibbs sampler and answers the following questions in simple words :

- What is a Gibbs sampler ?
- Why was a there a need for such a sampling algorithm ?
- When is it used ?
- Why does it work ?
- How is it related to Data Augmentation Algorithm ?
- When does the algorithm fail ?
- What are the fields where Gibbs sampling and Data Augmentation algo usage is exploding ?