Where every click is a journey and every impression counts.
The revenue generated for every dollar spent on advertising, assuming your attribution model isn't complete fiction.
In data retrieval and marketing analytics, the percentage of all relevant content your search or campaign actually captures. High recall means you found everything; low recall means you're basically Googling blindfolded and hoping for the best.
Automatic auction for ad impressions in milliseconds, where advertisers compete and the highest bidder's ad shows. It's the stock market, but faster and for eyeballs.
Something that was already made by someone else and is therefore available for immediate use without your input. In fashion, it's the alternative to custom tailoring; in business, it's the escape route from actually thinking about originality.
Revenue generated divided by advertising costs. Every dollar spent on ads should return multiple dollars in revenue, or you're funding other people's businesses.
Showing ads to people who have already visited your website but didn't convert—digital stalking with a polite veneer and a display network budget.