Drupal 7 introduces a number of new apis and with those comes new jargon. Untangling that could be daunting. I'll try to briefly sketch what is what and relate it to terminology outside of the Drupal world.
Every day, millions of people use Google Image Search to find pictures, products, and people. If you're using Drupal, chances are you're not getting any of this traffic.
As our community grows, it is imperative that we preserve the things that got us here; namely, keeping Drupal a fun, welcoming, challenging, and fair place to play.