What is AdSENSE - adds on my site?

A lot of people are asking me what is with the adds on my BLOG now. I signed up for this so they are allowed/supposed to be there. Basically what google offers is a way for people to make money by allowing companies to advertise on your website. This is legit and if there is a link to the right that interests you click it and you will be brought to the article or site and I will make some money for every click you make. At the top of my site is a google search engine so you can surf while keeping my site up. The sites advertised are geared toward the main content on my site....so kids and dogs. You may see the odd Septic tank add since I have posted about the dream acreage. lol