A friend asked how to maintain high search rankings of a bunch of URLs that use Google’s
#! AJAX URL convention. He cited Twitter as an example of a website doing it well. It’s true that Twitter uses
#! in its URLs, and that Twitter pages rank highly in Google’s search results, but I notice that the search result URLs omit
#!. Here’s how I think Twitter implements
#! to maintain high search rankings:
The pages that rank highly omit
http://twitter.com/matthewlmcclureis a static HTML snapshot rather than a real time feed.
#!URL that loads a real time feed:
#!URL, there is a corresponding
?_escaped_fragment_=URL returns a 301 with
Location: https://twitter.com/matthewlmcclureto close the loop and present the HTML snapshot to Google.
The content that Google sees for a
#!/foo URL is different from what it sees for
#!/bar so Twitter avoids any duplicate content penalty.