You are right, a good knowledge of Google Analytics now can be a good starting point. I think everyone understands that almost every site uses Google’s traffic tracking code on their site. Skilful handling of this tool can help businesses get more out of marketing investments. The certificate itself is not particularly useful, since many of the answers are now online, and the most important thing is to be able to apply the theory in practice, and be very skilled. I also recommend learning other SEO-related tools, such as Ahrefs or a traffic analysis tool from https://sitechecker.pro/traffic-checker/ to increase your case with useful programs