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Are "Redirect 303 & Iframe" types of backlinks?
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Are "Redirect 303 & Iframe" types of backlinks? google count them?
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Mostly no on iFrames, or not in a reliable way. Redirect 303 is more uncommon, but similar to a 302. Either one is not the way to permanently send old content to new. Google has a guide on redirection here: https://support.google.com/webmasters/answer/93633, and iFrames here: https://support.google.com/webmasters/answer/34445. Cheers!
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