Certifications can act as filter when competing with other candidates. Candidates with certification will have edge during initial or first round. However it is not the deciding factor while making hiring decision.

If you want to learn new stack then please take the certification and get acquainted. Real world experience cannot replace the certification.

AWS has more popularity and acceptability. There are so much of free and paid tutorials online and one pass with relatively minimal effort.

If you are targeting to work in Enterprise sector, I would recommend to take Azure Cloud certification. Azure certs are gaining lot more traction.

Taking a Niche or Specialty certs like (AWS ML, AWS Security) will have lot more weightage during the interview process. The specialty certs are difficult to crack and need some real experience.

Here is my journey of taking AWS Solutions Architect - Associate certificate.

https://www.rasikjain.com/posts/tips-and-resources-passing-c...

Good luck.