Your cover note is important, every employer tells us this over and over again.
Show the employer you are genuinely interested in their company, the job itself and what you can bring to the job. Mention specific skills or experience you have that relate directly to the job posting.
Be authentic, avoid jargon, convey your personality and make sure it's clear that the note is unique to that role. Do not send Generic cover notes. Avoid over used phrases like problem solver, self-starter and so on.
The cover note is an early chance to show the employer that you are the right person for the job. Put some thought into it.