Can any one explain, on quick turn around time does link building process helps to take keywords on top rankings and in quick time. Please suggest
You can collect backlinks for your website by social bookmarking, forum posting, article submission, directory submission etc...
You can make quality back link with the help of Directory Submission, Article Submission, Blog Posting and Forum Posting and Link Exchange and if you want to quick result by your work then post unique text in Blog and article and need quick cash.
There is no exact time to see keywords ranking as it all depends on the competition you are up with. If the keywords you are optimizing have low competition then you may see results in only few weeks, i.e. if you are putting white hat SEO efforts. But if the competition is high (in millions), then it won't be quick to see results in SERPs. Hope this helps.