WordPress comment pagination & duplicate content
WordPress version 2.7 has comment paginationÂ - so that pages with 00s of comments only display, say, 50 at a time - built into it (the functionality is built in - you still need to make a load of amends to your theme to get it to work. More on that another time ...).
But it has a problem. (Update: See later post with solution to duplicate content on paginated comments).
Comment pagination is likely to lead to issues with duplicate content in google - the paginated comments will have the same titles and meta descriptions. Google will see them as identical and therefore discount all but one of them. For instance, compare this page and this page - same titles, same meta description, same post at the top - but different URLs and different comments.
So if your comments are useful from an SEO point of view, I wouldn't use comment pagination (you can turn it off, or set the number of posts per page to be very high).
Sorting out pagination, meta descriptions and titles
This is already a problem with the standard wordpress loop - pages 2 or higher of a category, tag or whatever are already often seen as duplicate content.
My unique meta descriptions for wordpress method doesn't solve this problem. But then what does - all in one seo pack doesn't either.
There's a possible solution to this - if wordpress gave an option to automatically append '- page X' on the titles and meta descriptions of any paginated page. It's just wordpress doesn't let you do that.
So until something like that is introduced, I'll see if I can find anyone with a work around and report back. Or if you've got one, post it here.
And I'll try not to rise to the bait of anyone pointing out that I don't have enough comments on any posts for it to be a problem ...
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