What is Google Adsense? - It is a service that will let you place ads of other companies on your website. Once a user clicks on the add, you get paid

How can I make money from Google Adsense? - Place ads on your site, send users to your site, and get paid when they click on an add

How much money can I make? - unlimited

How much time do I have to invest in it? - Once you get your site up and running, then NOT much time at all. This is one of the best, and easiest money-makers online.

Does it cost anything to sign up? - NO, it's free to signup. You may have to pay for a hosting service to host your website (there are some FREE hosting services you could use).