I look after 3 sites which have a lot of crossover on products. We have 1000s of products and I've made it a requirement that we give each it's on description on each of the sites. This sounds like the right thing to but it's very hard for our content writers to write three different versions descriptions, especially when we have variations on the products so potentially writing unique product descriptions for 4-5 very similar products on three separate sites. We've worked very hard to create unique content deep through the site on all categories, subcategories and tag combinations and along with the other SEO work we've done over the last couple of years is producing great results.
My question is now far do we have to go? I'm busy writing some product descriptions for a 3rd party site for some of our products, the easy thing to do is just copy and paste but I want Google to see the descriptions as unique. Whilst all SEO advice will say 'write unique descriptions' from a practical point of view this isn't especially useful as there doesn't really seem to be much guidance on how different they need to be. I gather we can't just move around the paragraphs or jumble up sentences a bit but it is easier to work from a description and change it than it is to start from a blank slate (our products range form being very interesting and unique, to quite everyday so sometimes tough to create varied unique content for).
Does anyone know of any guidance or evidence of just how clever the Google algorithm is and how close content has to be before it becomes classed as the same or similar?
Thanks
Pete