Softwares form a very integral part of our computers. We, that is consumers, might not be aware of it because software does not have any physical manifestation but this does not reduce importance of softwares in a computer. And as softwares are so important for functioning of a computer it is very important to ensure that softwares are not plagued by any flaws or loopholes. This is why software testing and Software Testing Life Cycle are very important in this context.