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I use BigCommerce, and they have a system where all the URLs are dynamically generated from the name of each product. So if I named a product "widget x y z" the url would be /widget-x-y-z/, and if I changed that to "blue widget x y z", it would change to /blue-widget-x-y-z/ and automatically redirect the old one to the new one. As a result, in 6 months, because of a lot of tweaking and experimenting, I've ended up with a hefty list of 400 redirects. Some of them are very old, and some are recent. So my question is in two parts: a) does having all of these redirects hurt my rankings? b) if so, would deleting them help?

I run an eCommerce store and have a decent number of quality links pointing to it(which is still growing). It's been 6 months since I started it, and I'm getting between 100-120 organic visits per day right now. I've had a few more quality guest post/infographic links, and I'm also focusing on optimizing individual pages, but my traffic still seems to have plateaued. I'm beginning to doubt that more links is the answer. All of my content is unique(no manufacturer descriptions) and I'm still being outranked by sites that have spammier link profiles and copy/paste descriptions. Any thoughts?