hi.. My website is working well in SERP's for Google.co.uk and Google.co.in but my SERP's Results poor for Google.com , what would i do for better Ranking in Google.com .
For good ranking in google.com there is more competition as compared to google.co.in or co.uk , so you will have to build more quality backlinks if you want to get in good position in google.com search results. See who are ranking well in google.com & where they are getting backlinks from , and work accordingly.