I've had my online store (beauty products) for close to 10 years .. Years back I was ranked first for all major keywords but over the past couple of years this has dropped a lot and now most orders come from advertising and not organic search.
I've got around 150 products and most product descriptions were just copied from the manufacturers site - Pretty much what all my competitors have done to.
The opportunity has come where I can cheaply have someone basically rewrite and make all our pages/descriptions unique. For SEO is this really a no brainer and should I get onto it ASAP? My only worry is if I have left things too late so it's not worth the time. Because everything has already been indexed for ages, will doing the changes now have any positive impact? All new pages/articles/blog posts etc I do now are 100% unique but would it be worth going back and doing all the old pages still?
Any feedback or advice would be awesome :).