First - have you ever put an ebay ad or Amazon ad on your Hub page? When editing the Hub, the right top part of the screen shows the types of content you can add to your page. Some is your hub text., some can be fotos, graphics, some can be video from Youtube, and yes, then there are ads from ebay and Amazon. So pick the Amazon Icon and when you click on it, the hub gets a new empty Amazon capsule added at the bottom of the hub, below your comments capsule. Move it with the green arrow controls. Click and hold then drag your Amazon capsule to the part of your hub you prefer and release the mouse and it will appear in that location in your hub, once you click on the bottom where it asks to confirm the changes and or save the capsule move. Now Go to your Amazon capsule itself and click edit on its top and the capsule will open - allowing you to see its options. These options allow you to choose what kind of product from Amazon you can put there. It might be books, videos, music, posters, or whatever...
You have to pick a keyword or description of what you want the Amazon ad to be. If you have researched Keywords for your Hub on a niche subject, choose a niche word from your keywords that gets a result. If you can't decide what you want - click the display of all results and choose how many you want to appear on your hub. You can have up to ten ads per capsule. If you know the EXACT product on Amazon that you want to advertise, there is a way in the capsule to key in its exact details and that product will appear where that capsule displays on your hub. Placement is everything. You should experiment with the way capsules look. You might like to have Text appear beside the Amazon ad or appear to "wrap around it. Use the capsules green move arrows to your text and amazon capsules around - they move up, down and to one side using the green controls found on all capsules. You will find that sometimes you might earn more money from Amazon ads than Google adsense some times.
To do that you have to go to the Page for Affiliate settings and find where you have to enter your affiliate settings. To get that affiliate code or code for setting up - you will have to register with Amazon. In the Affiliate and related help pages there is simple info there to follow the steps for setting up your Amazon code. I hope some of this was a help to you. Best of luck!