The internet, like every other field, has a language all its own. And when it comes to marketing on the internet, the labels proliferate rapidly. Can you tell “search engine marketing” from “search engine optimization?” How about “website promotion” from “online promotion?” Can you tell your Yahoo Yellow Pages from your Yahoo Local? Or “pay-per-click,” from “pay for performance,” not forgetting “paid inclusion?” Is it any wonder people are confused? Adding to the confusion, many of these phras.