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Why doesn't the Wikipedia homepage have meta tags?

Here is my issue and I've asked a related question on this one. Here is the back story. Site owner had a web designer build a duplicate copy of their site on their own domain in a sub folder without noindexing. The original site tanked, the webdesigner site started outranking for the branded keywords. Then the site owner moved to a new designer who rebuilt the site. That web designer decided to build a dev site using the dotted quad version of the site. It was isolated but then he accidentally requested one image file from the dotted quad to the official site. So Google again indexed a mirror duplicate site (the second time in 7 months). Between that and the site having a number of low word count pages it has suffered and looked like it got hit again with Panda. So the developer 301 the version to the correct version. I was rechecking it this morning and the dotted quad version is still indexed, but it no longer lets me look at the cache version. Out of experience, is this just Google getting ready to drop it from the index?

We are new to SEO MOZ, and as we are doing our evaluation, multiple page problems have arisen.  Our domain is www.moxicopy.com and www.moxicopy.com/blog. Our blog is wordpress hosted but integrated into our site.  As we ran our analytics from MOZ PRO, we got TONS of Duplicate Page Title and Duplicate Page Content warnings, over 90 each. Most seem to come from our blog and our different products (we are an ecommerce website). Would the canonicalization of the pages be the cause? And couuld someone further explain exactly what canonical/canonicalization is>?  I am very confused, and have a feeling that this is what has hurt our site so much in the last 2-3 weeks

I have been working on an eCommerce site www.fuchia.co.uk. I have asked an earlier question about how to get it working and ranking and I took on board what people said (such as optimising product pages etc...) and I think i'm getting there. The problem I have now is that Google hasn't indexed my site in over a month and the homepage cache is 404'ing when I check it on Google. At the moment there is a problem with the site being live for both WWW and non-WWW versions, i have told google in Webmaster what preferred domain to use and will also be getting developers to do 301 to the preferred domain. Would this be the problem stopping Google properly indexing me? also I'm only having around 30 pages of 137 indexed from the last crawl. Can anyone tell me or suggest why my site hasn't been indexed in such a long time? Thanks

Google "halloween costumes", see the yandy listing that shows product data and pricing under their listing? How did they do this? I realize its a rich snippit of some kind but i don't see in the code how or where this is. I've yet to see anyone but Amazon influence the SERPS yet with rich snippits. Pretty interesting