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No they will be staying the same.

I recently designed a new website to replace an old site. We managed to hold 90% ranking and traffic by keeping the same URS's and content.

Now that we have completed that we are now updating the whole site. It is an commerce website. Some of the items we were selling we are getting from a new vendor. If I move these products from one one vendor to another will this affect SEO?

Here is an example. I have a product called "Green Zipper Sweater". This product is Anchored via Manufacturer and Category. The URL and Title Tag are  green-zipper-sweater. If the Sweater was made by "Nike Green Sweaters" and our new supplier is "Gap Yellow and Green Sweaters". If I change the the Manufacturer and now put it under "Gap Green and Yellow Sweaters" will this affect my ranking.

We are continuing to stock products from the original supplier "Nike Green Sweaters" and we have an aggressive SEO plan and are ranking very well for "Nike Green Sweaters". We also have good product ranking so "Green Zipper Sweater" brings us a lot of traffic. I want to be sure I do not loose ranking for  the product page "Green Zipper Sweater" and the Brand "Nike Green Sweaters"

Any advice would be appreciated.

Hi,

The website is an commerce website. ShamrockGift.com is the name of the website. I am moving it from a custom platform to prestashop. We have changed the way the system writes the URS's so we will be able to copy them exactly as they appear on my current website. Also all content etc will be the same. I was going to keep it on the same server. I was hoping drop no ranking but I was worried if google will just crawl it the same.

It is a hard area to get advice on, it is difficult to find an SEO company that has actually did this for a small commerce website.

I am moving my website to a new platform. The URS's will be the exact same. What are the 10 most important items I should check before I swap over to the new platform.