hi, Pls clear me if i optimize a url eg:www.x.com,and it comes in first page of google, if i change the url name eg:www.y.com will the ranking result go down. anybody pls clear me soon thanks sundar.
You would need to 301 redirect x.com to y.com Your rankings might disappear for a month but they should return to where they were.
Best redirect method if u want to rename files and u want the ranking of the page to be stored ,u must have a 301 redirect-permanently moved. And to know what is 301 redirect search google for it and read 2-3 sites u will get the answer.