Quick background: I was a highly ranked baseball web site, ranking top 10 for almost all non-superstar Major Leaguers until 2011 when my site lost rankings for internal pages. I dug my head in the sand for a long time, depressed about rankings and nothing changed except for a couple of 3 day periods where rankings appeared better and then went away again. This made me even more depressed!
Fast forward to today where I realized that in Webmaster Tools, I had about 30,000 Server Errors and 20,000 Not found errors. I have moved my content a few times over the years without so much as a 301 redirect. Any redirect was a 302 using ASP's response.redirect.
I've been digging into the errors and trying to clean up the errors and redirecting everything to the new pages. I've been at it for about 5 days now and I'm not sure if I'm on the right track to recouping my rankings and i'm not sure how long it will take. WMT only gives me a 1000 each day for each error type and I've managed to wittle the list down by about 1000 each day.
Questions:
1. How long does it take until Google handles 301s
2. Would 60,000+ errors (500 and 404) cause me to lose rankings?
3. I also have lots of more than 30,000 pages of duplicate content. This might be cleaned up with my 301s though.
4. Anything else I can do?
Any help would be terrific.
[edited by: tedster at 7:30 pm (utc) on Mar 27, 2012]