Affiliate marketing is a common internet marketing practice. The concept of it revolves around a merchant (or advertiser, brand, seller), an affiliate and a customer. A merchant, in order to widen his customer base, hires an affiliate to place his advertisements on the affiliate’s websites and when a customer or visitor is brought to the merchant’s page by the marketing efforts of the affiliate, the affiliate gets a fixed commission. An affiliate’s commission depends on his commission plan which might be a Pay per Click (PPC) or a Pay per Sale (PPS). Majority affiliates resort to Pay per Click commission as every time a visitor clicks the advertisement provided by the merchant, they get paid, albeit a small amount. Pay per Sale compensation method is not very common as the chances of a sale are rather less as compared to a visitor clicking on the advertisement. But, affiliates compensated by PPS method get a specific percentage of the sale amount which may be substantially more than what the PPC compensatory method offers. If you run a website or a blog, you can opt for this sort of marketing as it can help you earn some extra money without any effort.