if You want to monetize an existing website then your goal might be to make money off your website without trashing it out so your users don’t leave (good goals). Your strategy might be to use higher payiung Affiliate Product Marketing so you can have fewer targeted ads on your site that pay you more for each conversion (sale) (or you could go whole hog and Buy a Affiliate Store System and let IT build your Affiliate Marketing Store within your website for you so that you can focus on blogging and keyword rich content!
FREE MLM vs. Affiliate Marketing Video with companion Guide
Affiliate Marketing involves marketing the product of another company> as an affiliate of that company you share in the proceeds of the sale. They may provide you with marketing material and they may provide you with sales materials (such as videos to use on your Website, etc). but at the end of the day wether you are an affiliate market rep for one company, one product or if you use an automated tool like Datafeedr to generate an entire Affiliate store for you on your Website, you still only make money when you initiate the sale of the companies product.