Long-tail keywords are more specific search phrases that usually have lower search volumes but also lower competition and cost per click (CPC). By focusing your CPC campaigns on these keywords, you can reduce your average CPC while attracting visitors who are more likely to convert. Use tools like the Semrush Keyword Magic Tool to identify long-tail keywords by filtering for phrases with two or three words. Incorporate these keywords into tightly themed ad groups to increase ad relevance and improve your Quality Score, which further lowers CPC. This approach helps you maximise your advertising budget by targeting highly specific user intent with less competition. [Semrush]