أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
Absolutely skills!, because skills you can proof. Certification is very useful because any Certificate makes the entrance easier, but without skills .........
Certificates are good, but they will do less in the absence of skills. Skills and knowledge can be reenforced by education and awarded certificates.
One word: "Skill."
Skill is more important.I think, without skill certification cannot be fulfilled.