Quality assurance (QA) is a process or set of procedures intended to ensure that a product or service meets or exceeds customer expectations. QA services are a set of measures that a company takes to ensure that its products and services are of high quality and meet industry standards. This includes the use of testing, inspections, and audits to check for compliance with quality standards, as well as the implementation of processes to prevent defects and improve overall performance. QA services are often used in manufacturing, software development, and service industries to improve customer satisfaction and reduce costs associated with defects.