'Quality traffic' in CPA marketing means visitors who are highly likely to take the desired action, such as signing up, downloading, or making a purchase. You focus on targeting the right audience who are genuinely interested in your offers. You avoid irrelevant or untargeted traffic that won't convert. Quality traffic comes from trusted sources like organic search, social media, or paid ads where you can target specific demographics. You track and optimize your traffic to ensure it aligns with your offer. In CPA marketing, quality traffic leads to higher conversions and better return on investment.