It is only after you take the first bite of an apple that you know if the fruit is good enough or not. Similar it is with any product, be it a gadget or a software. Software flaws have caused millions of dollars in losses. This is why Quality Assurance is critical when an end-user product is created. 
Quality Assurance, quality control and testing are often used interchangeably. However, Quality Assurance in software testing ensures that the quality of software products or services provided to the customers is as per the objectives specified.
This course focuses on improving the software development process, and making it efficient and effective. As a software tester for Quality Assurance to flourish in your role, you will need the following skills: 

• strong communication skills 
• problem-solving skills
• the ability to work under pressure
• attention to detail
• the ability to work as a team 
  

The career opportunities are plenty in this field.