In the field of testing, it is customary to talk about the quality of the software itself, about its verification and evaluation. But it is also important for customers to know and control that the product testing itself also goes well, all the most important aspects are checked, a sufficient number of tests are performed, a sufficient number of errors are corrected, etc. That is, the quality of software testing, like many other works, must also be evaluated according to different criteria. Such criteria are called QA metrics. They represent various coefficients and indicators, with the help of which you can make a picture of what is happening on the project, evaluate it and make a decision to improve the processes if necessary. Metrics relate to various areas in testing, for example, requirements, quality of the product itself, efficiency and quality of work of the development team and the testing team, etc.