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When creating a redirect map for a site re-build or domain change, it is necessary to include .PDFs or any other non-HTML URLs? Do PDFs even carry "seo juice" over? When switching CMS, does it even matter to include them? Thanks!

I typically see browsers refresh at 48 hours the longest. We pushed some changes through production about a week ago and Chrome still has the old version cached. I'm seeing some similar posts and wonder if Google is up to something and we are starting to "cache" on (pun intended)?

I find that the advice for multi-language sites is always tied with multi-region, but what about US only sites that want to be multi-lingual? What are the best practice recommendations there? HREFLANG tags necessary? TLDs? Do you need to purchase yoursite.us , yoursite.sp , etc.. or would yoursite.com/en yoursite.com/sp suffice? Should the extensions be region based even if the language is the only difference?