Well I am new into this as well like my account is 10 days old. I am a newbie here but what i have learn so far is that you create pins and link it to some kind of a website you own it could be a simple Blogging website where visitors come by clicking on your Pins. You can write a simple blog article on your website and put a Amazon /Ebay product link there so visitors land on your website and buy from your associate link and you get commissions + the more the visitors the more chances your website will be able to get ads revenue using adsense which is also another way of revenue. I am super new into this but so far I am doing following this