I am not new to SEO just not sure how much weight certain situations affect your SERP. I have a site with roughly 27,000 items. A lot of those items use the manufacturers product description also I sell a lot of similar items that are the same item just different designs and colors on the item. For example a blanket.
I notice competitor sites who have NO PRODUCT DESCRIPTION are ranked higher than me when I have a better PR. Will duplicate content on your site really affect me that much in SERP? how about duplicate titles? My title for example are similar to this "red 50 x 60 blanket" and "blue 50 x 60 blanket" plus many more like that.
If I have 200 items that are the same with a slight different how many times can I really describe the same item in a different way so it is not duplicate? My questions really are these below
1. Can I change roughly 1 or 2 words in the title and description where it will not count as duplicate content?
2. Any quick cost effective ways to change thousands of descriptions quickly?