"Electrician" is one of the most searched trade words in Sydney, and plenty of those people want to become one, not hire one. Every apprenticeship, course or salary search that clicks your ad is money gone.
Negative keywords stop that. Our starting list for electrician PPC blocks jobs, careers, apprenticeship, course, TAFE, licence, salary, wage, DIY, how to, YouTube, Bunnings, parts and wholesale. Then we add the work you don't do. No solar? Solar gets blocked.
After launch we read the search terms report every week, then fortnightly once it settles. Real searches, real money. Anything that won't turn into a paying job gets struck out.