GOOD - A technique I've seen used quite a lot is the "Check Price On Amazon" link. Instead of displaying the product price, they display a hyperlink with anchor text of Check Price. This makes the buyer more curious to click the link and see how much the product is. And remember, Amazon have a 24 hour time limit before your affiliate cookie expires, meaning if the potential customer buys anything on Amazon within that 24 hour period of clicking your link, you're going to get a commission!
An affiliate agreement is when a company or an individual agrees to pay you for successful referrals. For example, Amazon has a massive affiliates program where they pay you a percentage of the sales you generate using their affiliate links. Affiliate marketing is everywhere these days. In fact, we’re able to offer our own Blogging Mentorship Program for free because Bluehost sends us money for every customer we refer.