Hi, Normalization is a process that you can economically remove extra data from your database however you don't lose any data. By the way, there are 5 steps of normalization that first three one are somehow necessary while creating database.

Normalization means eliminating redundant information from a table , don't contain any type of anomalies and organizing the data so that future changes to the table are easier.

for better and brief understand http://www.tutorialspoint.com/dbms/database_normalization.htm

Normalization means eliminating redundant information from a table and organizing the data so that future changes to the table are easier.

Normalization is a process in which tables and fields of a relational database are organized to minimize redundancy and dependency.