Well,the secret lies in various online advertising programs.And one of the most popular and the day job killer program is the "Adsense Program".It works by serving targeted ads on a specified website or a blog.Whenever someone visits your site and clicks on it,then you will earn money.This means that this is the absolutely free money as you have to do no work for it.Once you have setup the ads on your site,then you will see the revenue flowing in your account. Adsense is the only program that pays huge amount of money,i.e.,between $0.01-$10 for a single click.In this,the ads are served based on the content of the website.For example,if your website is of the category of softwares,then the ads displayed will be of software contents,various useful products. Google adsense works only for advertisers and the publishers.Advertisers pays a little amount of money to google for displaying their ads while the publishers earn money by serving ads on their websites.This means that everyone can earn money from this day job killer program. Actually,it contains three products.These are:Adsense for content,Adsense for search and Adsense for mobile.It also provides you all of your earnings report and performance of your website.It is really one of the smartest ways of earning money and once you understand it fully,you will find that using adsense ads for earning a lot of money is not only easy but also a lot of fun. Adsense pays through check or international bank transfer and the minimum payout is only $100 which is very easy to be earned.Once you have earned $10 in your account,then google sends a PIN code to your home address via normal mail.This PIN is necessary for the payments transfer.You have to put that PIN onto your adsense account and then it confirms your earnings and then you will be capable of receiving checks from google.