Can I redirect many dynamic URLs to one static URL? I have many dynamic URLs indexed. The pages have almost the same content, just differ in currency. I want to redirect them all to one single static url. I wonder what would happen to SERPs.
It may be a good idea to redirect them, except for your visitors who need to see a different currency. Another idea might be to make each currency a separate folder. Then you can tell the search engine spiders to ignore those directories via the robots.txt file.
You can't redirect them to one page 'just for' google bot. That would be masking and might get a penalty. You can of course use robots.txt to prevent google from indexing the dynamic pages. You need not make then directories, you can disallow individual pages but your robots.txt might become large if you have a lot of pages.