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Thanks for the in depth answer Patrick

Hi there Immediately, I would check your Webmaster Tools and see if you have a Manual Action of any kind. If you do have a manual action - read through the Ultimate Guide to Google Penalty Removal. It seems like you are taking care of your On-Site SEO pretty well. I would also make sure you are using canonical tags on product and category pages properly. I would also start benchmarking your sites as they currently stand and tracking progress as you go through implementations and changes to your site. Take a look at this competitive analysis resource from Moz, not to copycat, but to instead utilize for your own unique website and audience. Make sure your mobile SEO is the best it can be. Also, make sure you are taking advantage of Schema.org as it can potentially help your website improve in rankings - here is Google's Testing Tool to see if your web development team implemented it correctly. Take a look at Enhanced Ecommerce to see what products are giving you the best traffic and conversion rates. From there, you can structure your site in ways based on audience behavior and implement that behavior into your marketing strategy. And lastly - start tracking your keywords in Moz and Webmaster Tools so you can see where you have opportunities and where you can improve. Hope this all helps! Let me know if you have any more questions or comments! Good luck!

Hi Thomas I would try it with a few products to see the effect in analytics and search rankings. Keep track and records (consider version control) of where your backend is right now, so if you have to revert, you can quickly. There are some things you need to consider when changing URLs, especially on a grand scale: Make sure you pay attention to eCommerce optimization Here is a great resource from KISSmetrics Create a strong URL map Here is a great URL Mapping resource from Google Canonicalize your URLs Use a canonical tag on these new and old URLs to reflect the new URL as what you wish to rank You can learn more here Update your sitemap.xml Update your sitemap xml and also submit it to your WMT and Bing WMT Correct all of your internal links to reflect the new structure Consider using relative URLs If you want, find your high quality backlinks using Moz or Majestic Reach out and ask them to reflect the new URL structure Consider https if you haven't already https is now a ranking factor - since you are collecting information from users, this is something you should consider If you do these redirects correctly, this shouldn't be a huge issues, as Google will pass 90-99% of link equity. Keep track of your rankings and traffic in Google Analytics and Moz. Watch carefully and be in touch with your web development/SEO lead (if you have one) throughout the entire process. Hope this helps a bit! Good luck!

Hi Thom, I don't know anything about "endpoints", but you maybe don't need a Yahoo store specialist, but just a regular SEO who can help you diagnose some of your problems. Moz has recommended companies you could reach out to ask if any offer hourly consulting. If they don't, try going thru the Q&A searching for any questions related to ecommerce and see who pipes in with helpful advice. (There is no ecommerce category in the Moz Q&A. I checked.) You could try approaching them. I say that b/c I did a scan of your site and saw some duplicate pages, for example, http://www.atlasphones.com/reli.html, http://www.atlasphones.com/reli1.html and http://www.atlasphones.com/reli2.html, two of which look like they might be errors or oversights. It could just be that you need someone to help guide you through the process of discovering root causes and potential fixes. I worked with Yahoo store a few years ago, it has its querks, but is much like any other online store so if you can translate Yahoo terminology working with a SEO you might be able to make some great headway. A second thought is whether you might be able to tag your "endpoints" or "items" as canonical and see whether that deals with the problem. It's a start anyway. Good luck!