NOTE TO SELF: LEARN THESE, K?
From: Google Affiliate Network publisher glossary:
Cost-per-action (CPA)
With cost-per-action (CPA) advertising, advertisers only pay when someone makes a purchase or completes an action on their site..
Commission
The payment you get from from advertisers for a qualified transaction. Commission rates, which vary by advertiser, are typically a percentage of sale revenue.
Bounty
A flat fee paid by advertisers to publishers for a qualified action (such as a lead or subscription).
Impression
The number of impressions is the number of times an image ad unit hosted by Google Affiliate Network is displayed. Impressions are not tracked for text ads, or for image ads not served by Google Affiliate Network.
Click
If a user sees an ad on your site and clicks on it to do business with your advertiser, it's recorded in your account as a click. Clicks are counted within a 30-second time period.