In order to measure various aspects of a PC's performance, the reviews of laptops and sometimes phones are benchmarked. Benchmarks are used by more than one person. They can assist us in many ways.
If a new PC will be better than your old one, you can use benchmarking. They can tell you why your PC stutters. They can tell you if your setup can handle the latest and greatest game or if you need to upgrade. They can help you decide if you should upgrade to a better graphics card or not.
Monica Chin is an expert in all sorts of benchmarks and she has written a series of articles about how you can use them to assess your own computer system. See how you can become a technical diagnostician.