When I first started my career in the web industry, the very thing that I spent most of my time on was to look up the meaning of so many different terms and synonyms (which took as much as 50% of my time a day!). This glossary may help to save so many of your late night sleep searching in wikipedia!
Above the Fold – Content appearing on a website when it first loads, without requiring the user to scroll vertically. This is frequently considered the most valuable screen real estate.
Adsense – A popular ad network, run by Google, that allows you to publish contextual ads to make money from your website or blog.
Affiliate – Someone who promotes another person’s (or company’s) products on their website or blog and collects a portion of the sale price as compensation for sales referrals.