Asking "what certification should I get?" doesn't really fit with the Stack Exchange model of Q&A: strangers telling people how they should plan their career is always a bad idea and usually too localized to the asker's specific circumstances.
One way to make such questions not too localized, or at least more general, is to create a list of certifications, like you suggest, to let people decide on their own which ones seem interesting. Canonical lists do have their uses, but they're an exception to the rule, and generally reserved for a last-ditch effort to try and save a question.
There are a few problems with trying to use lists as the "go-to" method to solve a question quality problem like this:
- It's untenable for us to create a canonical list of every single certification a person can get, and more importantly, provide a reason why it's on the list (instead of just adding a link)
- What criteria are used to generate the list is an open question, making the list dubious in quality or accuracy
- While everybody likes the idea of lists, very few people take the non-trivial amount of effort to actively maintain the list
- Lists are still outside the Stack Exchange style of Q&A
Instead of telling people what they should do, or providing a long list of stuff and telling them "have fun!", it's almost always going to be better to ask questions that informs someone how to find and decide for themselves. Stuff like: