Skills you can learn. Obviously if you have them already, it is a big plus. Otherwise, if you show you have some skills, that’s a good sign that you can learn new ones too. That’s why some interviewers ask questions more relevant to your CV than the job requirements.

It’s more important that you have a professional attitude and can contribute to the culture and values. That’s much harder yo learn. And a wrong character with even all the hard skills can ruin everyone.