It is necessary, because training is the only way to enter the business quickly, which can not only save a lot of time and experience, but also spend money to buy experience. In short, there is no need to spend time in exchange for the experience that money can buy, and it is not worth it. Training can not only quickly enter the industry, but also accumulate industry experience and raise salary. At present, there is a big talent gap in software testing industry, but functional testing can be regarded as a state of universal saturation. The only thing missing is technical talents, and self-study is not recommended. If you have strong self-control, try it!