Ask HN: Most Useful Cloud Certifications ( Azure, AWS, GCE, ... )

Have you studied for a cloud certification? If so, i'd like to ask the following:

- Which one?

- Why?

- How many times did you try before succeeding?

- Was it useful?

- How did you prepare ( resources, ... )

I'm planning to certify for "Azure Solutions Architect Expert" and some feedback on usefullness ( in general or specific) would be nice.