Site revision

[jallenyang]

our site has complete redesign including site architecture, page url and page content (except domain). It looks like a new site. The old site has been indexed about thirty thousand results by google. now what should i do first?

[EGOL]

You say that you changed your page URLs.  Did you do 301 redirects for every page that has links or was generating valuable traffic?

[jallenyang]

yes, i did 301 redirects for part of the pages. how to move the pages that have been indexed. is it necessary to do 301 redirects for all the pages?

[EGOL]

If you have 301 redirects of every page in place as the new design is uploaded then the traffic that comes in through the old URLs will be moved by your server to the new URLs.  Also, search engines will follow links to the old URLs and give the new URLs most of the linkvalue.

If you don't use 301s on a page then any person who clicks a link to your site on another domain or in a search engine will not see the new page.  They could see the old page if you did not remove it or an error if you removed it.