# Define basic concepts of Information theory. - Compression Standard

### Information theory plays an important role in field of compression. Define its basic concepts.

- Information Theory is about quantification of information.

- It is used in compressing data.

- Entropy is a key measure of information.

- It is expressed in terms of average number of bits that are required to store a message.

- Entropy is used to quantify the uncertainty which is a process in predicting the random variable values.

- Lossless data compression, Lossy data compression and channel coding are the fundamental topics of information theory.