INTERNET: Q & A - Brought to you by CNN

As more and more marketers make online advertising a part of their media mix, they are also finding a unique world of Web advertising terms. CNN Interactive's "Internet Q&A" column is a regular series about the Internet that aims to explain basic terms in a simple, user-friendly way, and offers useful tips on how you can take advantage of this exciting medium. If you have any questions for this column, write to cnni.asia@turner.com Q: What's the difference between a Click, an Impression and a Hit? A: Click: A click is when a visitor interacts with an advertisement, by actually clicking on it so that the visitor is headed toward the advertiser's destination, although it does not measure whether the visitor waits to get there or not. Impression: An impression is the count of a delivered basic advertising unit. Impressions are how most Web advertising is sold and the cost is quoted in terms of the cost per thousand impressions (CPM). Hit: A hit is the sending of a single file (HTMLfile, an image, an audio file, or other file type). The number of hits from a site is not a good indication of actual number of visitors, but for the website space provider, however, hits can indicate traggic flow. Source: http://www.whatis.com/adterms/htm.

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