As with other forms of advertising targeting is key, and factors that often play into PPC campaigns include the target’s interest often defined by a search term they have entered into a search engine, or the content of a page that they are browsing , intent e. Content network properties can include websites, newsletters, and e-mails. Recently, paid-to-click websites have gone up greatly in popularity. This means that you will have no doubts about getting payments. Many platforms allow organizations to see their referral marketing return on investment ROI , and to optimize their campaigns to improve results. With lawsuits filed against the internet search companies, the burden has been placed on Google, Yahoo and others to determine valid clicks from fraudulent ones. However, websites can offer PPC ads.