Well, the secret lies in various online advertising programs. And one of the most popular programs is the ‘ADSENSE’ PROGRAM. The AdSense program works by serving ‘targeted’ ads on websites. Whenever someone visits your website, those ads are displayed, and you earn $$$$s. If someone clicks on those Ads, you again earn $$$$s. This means that once you have set up your website with AdSense ads, the flow of revenue is automatic without you doing anything else. Of course, if you do a little bit of tracking and performance analysis of your AdSense ads, you can enhance your profits many times.