What are the most important traits you should exhibit when trying to get a promotion? I’ve been at a role for 6 months now and want to let my case for a promotion to the higher ups towards year end

Establishing strong relationships
Doing impactful work
Asking good questions during manager 1on1s?
Being a vocal leader present and contribute to weekly team meetings?

zukking dick

If you mean general office with non-specific skills, mostly soft skills.

Agreeable with management, politically correct (within your office's politics - be liberal with liberals, conservative with conservatives), bureaucratic, careful with grammar, great written and oral communication, positive, be willing to take on more responsibilities without equivalent pay, and punctual.

brown nosing.

That is the key right there. You need to do the role of the promotion you want first, not the other way around. Once you prove you can do that role by actually doing it, you get the promotion and pay for that role. To do that you should understand what objectives the higher ups are measured on and make an impact that helps them meet their objectives. As a consultant my goal was always to get my "champion" at the client recognized and promoted by their management which got my contracts extended and built a great reputation in the industry that translated to success at other clients.

You don't have to do all this phony crap, just understand how value is measured and deliver it. The more directly you can tie your actions to money the better.

Soft skills.

People who report to me like me and trust me.

People above me know I'm not going to do anything crazy.

Oh yeah the other thing is that to be in senior management you need to not be a loose cannon, but you can't be a total yes-man either. You have to bring something to the table by having new or different ideas and questioning some of the things that the boss says.