Affiliate Networks

Affiliate networks remind me of Home Depot. If you are into Affiliate Marketing, you can use a construction contractor as an analogy. The contractor would go to home depot to acquire components needed to, say, do a roofing job. There he or she could locate shingles, nails, hammers, compressors, etc.
In the same vein, an Affiliate Marketer can go to a Affiliate Network and shop around for products and services that the marketer would like to promote.