When I built my site I did not realise that you could create directories / folders. Now that I have adsense on my site it would be useful if I could group together certain pages and place these is the appropriate directory, but this means that the old page that is indexed in Google and linked to from many sites will no longer be there and so it will generate 404 codes. Is there a sensible way around this so that I don't get the 404 code, can a meta redirect be used without causing any problems with google adsense or should I make a page saying that the original page has been moved and link to it, or should I just move it and forget about it? Thanks in advance for any replies
You can use a 301 Direct to point to the new location. (This is the technique Google advises) Just do a Google search and you will find the code to do this and put it into your htaccess file (Its quite easy)
use 301 redirects.. don't go for the meta redirects. With the 301 redirect you tell the search engines that the page has been moved permanently and the search engines will update their serp's with your new pages. http://www.tamingthebeast.net/articles3/spiders-301-redirect.htm