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Actually I'm asking about SEO consequences at whole. Let us say that I've choosed to use R301. Would the search engines decide that my domains are duplicated (even if content is less than 4% equal by copyscape.com) or the redirected page flows its juice to counterpart page w/o any penalties from SE? Something else that I have to beware of or must do? Thanks!

Hello Everyone, I'm new here and just getting back into SEO (a little bit) after not doing anything 'myself' for a couple of years.  My question is along the same subject.  Currently my individual URLs show as: https://www.example.com/index.php?l=product_detail&p=107 (dynamic responsive site). I can switch it to a static site, so the individual product pages read as:https://www.example.com/catalog/category name/product name-107.html It's still a long URL, but it would be keyword rich.  Some of my current dynamic pages are indexed,and due to an upgrade I had to do several months back, I already have some redirects (301) from my php extensions to the one listed above.  This is my long explanation to my following questions: Does having a dynamic or static site matter when ranking in search engines I already have some redirects coming my older site to this dynamic site, so I would have to make more directs from the dynamic site to my static site - is this okay to do? I'm really at a loss, a couple of years ago, I ranked 1-3 (on Page 1) on Google for all my keywords, (all White Hat work), and now I'm into great abyss of no mans land of the internet (ranked on Page 3+) Thank you for any and all help from everyone! ~Sandra