redirected all non www to www and also redirect domain.com/index.html to domain.com
is this beneficial so far?
But here is the problem. Many indexed pages in google are not there anymore so I wanted to do a redirect 301 because the url of those pages has slightly changed. For example domain.com/guitarbass13.html to /guitarbass.html
SO I made those redirects for 20 pages or so but after just a few hours the number of indexed pages in google dropped from 1900 to just 20. Why is that.
I removed all the redirected pages and the number went up to where it was before.
So is making 301 for changed pages beneficial of not?