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- corporate website pages - I would probably focus on these if they are providing conversions. - landing pages for specific content offers that are gated behind a form - Do these landing pages even rank since they can only be accessed by filling out a form? If so, then this would be last. - blog posts - Check you Google Analytics for the blog posts that are bringing in conversions (Time on Site, Sales, Leads, etc). I personally would let Google Analytics "show" me what to focus on 1st. I would make the pages that are already doing good become better.