Référencement payant The referral fee (also known as PPC for "Pay per Click") is a method that many site owners use to bring traffic to their sites. It is to build keyword lists and write short, catchy advertisements to attract the reader to click on your ad. The referral fee is usually to alleviate a natural search or failing to increase its position in the results pages of search engines. Indeed, you appear to be at the top or at the right as shown in this picture: For each click on your ads, you pay an amount set in advance (eg 0.10 € per click). (more...)