Simple Definition:

Statistics is the study of collecting, organizing, analyzing, interpreting, and presenting data [information] in order to make informed decisions.

For example, if a company wants to know how many customers are satisfied with their product, they can use statistics to collect feedback from a sample of customers, analyze the data, and determine the overall satisfaction level.

Very Simple Definition:

Statistics is the process of studying and understanding numerical data (information based on numbers) in order to make decisions.

For example, if a teacher wants to know how well her students did on a test, she can look at the scores and find what is the average score.