Google has announced support for Rich Snippets. This is information you add to your web pages using "microformats" to help Google understand specific data. For example, Google understands vcard tags. I think it's likely that they understood those long before this announcement, but now they have also added hreview for reviews and say that they intend to extend this idea.
I think it's great, but not everyone is so enthusiastic. Some think that spammers will abuse this or that it will only benefit large sites. While that all could be true, I don't see any reason NOT to make use of this - anything that helps Google understand your pages better has to help you no matter what anyone else is doing.
I've started doing this on pages here. I've updated recent reviews and added microformat tags to the Linux and Unix Consultants page. You can "View Source" there and look for "vcard" to see how this is done. For an example of using hReview, look at the source for Take Control of the Mac Command Line with Terminal. You'll see these tags in the source:
<div class="hReview"> <div class="item">
Those tell Google that this is a review. Later on, I tag the title with a "fn" tag. Notice that these are done "inline".
<p><i><span class="fn"> Take Control of the Mac Command Line with Terminal</span></i> is the answer. <div class="summary">Joe Kissell leads you step by step from knowing absolutely nothing to having confident control of Mac OS X Terminal and the bash shell. If you have been fearful of the OS X command line, this is where you want to start.</div></p>
I use a few more tags to identify the reviewer, the date, and a rating:
<p><span class="reviewer">Tony Lawrence</span> <span class="dtreviewed">2009/05/04</span> Rating: <span class="rating">4.5</span></p>
Note that you don't need to use DIV or SPAN - you can add these class identifiers to any tag, so if your data is already structured (for example with UL/LI tags), you can use those.
I'd like to see Google add a "tutorial" format with similar fields to "hreview" but the rating would run from "1.0" (Basic) to "5.0" (Advanced).
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More Articles by Anthony Lawrence © 2011-03-20 Anthony Lawrence
Just because they've sold you an IP based phone system doesn't mean they know anything about IP, does it? (Tony Lawrence)