There are a variety of tasks that you may be asked to perform. This can include delivering documents, delivering food or restaurant meals, taking pictures of a building for a real estate developer, taking pictures of a menu in an upscale restaurant, or even delivering auto-parts. If you have a good working car (or even a good bicycle), time on your hands, and a lot of energy, this can be a real opportunity to make money online.
One of the cool things about Google AdSense is that it's so easy to get set up. If you have a blog or website, you can sign up for a free Google AdSense Account. From there, Google will give you a unique code that you will paste onto your website. Google takes it from there, tracking your page views, traffic, and earnings on your behalf. There is no upkeep or maintenance to get this thing going, which makes it a no-brainer if you have a website already.