First let me say that as a jewelry business owner this is probably not going to benefit you much. AaSense is how you could make some money online by allowing other people to advertise on your website.
Naturally you do not want to allow people to advertising on your jewelry store website. But you should use this if you are a writer who frequently publishes your stuff online on a different website.
You could sign up with Google AdSense and allow them to put ads throughout your published writings, and if you are lucky you can make some extra money every month. Many writers make a very good living with Google AdSense, but unless you are willing to quit your day job I say not to bother.
