Now many platforms can do professional certification, such as Zhihu, Toutiao, Penguin and Baijia.
Professional certification can be said to be a personal label of the media account, indicating that your creative content is related to your real work content and can reflect the proficiency and professionalism of the vertical field to which your account belongs. For those who want to run media as a sideline, it is necessary to do professional certification. It's just that in real life, many people are only interested in self-media and have nothing to do with their actual work. It is also inappropriate to certify unrelated occupations. Even many people are freelancers and can't do professional certification at all.