A WebmasterWorld thread spotted, I believe, referrals from URLs that have _gwt_pg= appended to the end of the URLs. So what does the GWT and PG stand for?

Well, PG can be page. Where Google would append a page number to the URL for you.

GWT can mean Google Webmaster Tools.

This is all speculation and tedster seems to think the same.

I think it's a good guess that gwt="google webmaster tools". I don't make much use of GWT -- is there some way that you can tag specific urls from within your account?

I will track this a bit and update the post if I find out more.

Update: Martin Porcheron has commented explaining he has seen the GWT referral come from Google Web Toolkit, which makes a ton of sense to me. Thanks!

Forum discussion at WebmasterWorld.

Update 2: Vanessa Fox has said it is not coming from Google Webmaster Central.

I'm not sure what those parameters are, but they're not coming from webmaster tools.

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