One of the most important traits which every sales & marketing professional should have is a creative mindset & quick thinking.
One of the top sales skills in a resume hands down has to be good communication skills.
Good knowledge of salesforce software, CMS to track leads, maintain conversion data, or consumer database.
A one-liner that mentions numbers for your achievement will highlight your resume much more.
Marketing skills in a resume usually highlights the teamwork ability of a candidate.
Sales skills in a resume should always highlight a proactive mindset of a candidate.