QA testing (Quality Assurance testing) and software testing, while often used interchangeably, have distinct focuses in the software development lifecycle. QA testing is a comprehensive process that ensures the overall quality of the software product by encompassing all aspects of development, from requirement analysis to final release, with a focus on improving processes and preventing defects. Software testing, on the other hand, specifically involves the execution of test cases to identify bugs or issues within the code, ensuring that the software functions correctly. While QA testing aims at enhancing and assuring quality throughout the development process, software testing is a subset focused on verifying the software's functionality and performance.