Let's just say that when applying for a job, the certificate is a stepping stone. Companies will receive a lot of resumes when recruiting. HR will first sort the relevant experience of personnel from high to low, and look at the certificate when encountering similar experiences. Of course, if you have neither experience nor certificate, it is impossible for the company to give you a two-sided basic book.
The other is that when you are promoted, if you are an engineer certified by the Ministry of Personnel, you will be more likely to get opportunities for company appreciation and salary increase. Of course, the relationship between office workers is subtle. When the boss wants to promote you, but you don't have as much work experience as your opponent, the boss is likely to use certificates to calm the waves between people.
As for the OSTA you took, judging from the gold content of the certificate, there are basically no related subjects in the training subsidized by the Shanghai municipal government. Many college students have participated in it, and the certificate-holding rate is over 90%. According to the current situation, a certificate with more than 50% rate will become rubbish, so the role of OSTA depends on how much you have learned besides adding a few words to your resume.