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Page Rank
Used by Google, it is a grade on 10 which qualifies the quality of your website. This is a tool Google uses to measure the pertinence of your website.

Podcast
Radio broadcasting over the internet. You can download podcasts to your iPod or computer. Built as an RSS feed.

Portal
Marketing term to describe the first place people see when using the web.

PPC – Pay per click
A pricing model which most search ads are sold through. PPC ads only charge advertisers if a potential customer clicks on an ad.