Technological development is something you get to see every single day. The technology you learnt to use and got familiar with last week, will have a development next week and will require you to learn to use the updated version.
The companies that create these softwares are constantly updating them and improving them by the day. They aim to give their users an enhanced experience that is unique and easy, rather than give a complicated software that will not only require the user to spend a considerable amount of time to understand it, but may even discourage them from using it continuously, due to the complexities involved.
So how do the companies finalize on the version they release and how do the y update to make the software better? They have a separate team or a company that is into software testing. What this software testing company does is, do a test run and figure out where are the problems are and identify the areas that require fine tuning. They do the required changes and does a test run again, and again, until they are satisfied with the end result. When the software runs without a glitch and is usable, they release it.
These testing companies are the ones that get to use the software first and give feedbacks about the experience. These feedbacks are taken as inputs to improve the software, so that what reaches the end customer is as flawless as possible. These testing companies are also required to do these test runs on a regular basis, to ensure the software is running as intended. If the company meets a road block or experiences a problem, it is tended to immediately, so as to reduce the damage caused to the software company, due to the problem in their product.
These testing companies play a vital role in the success of a software.