Hi all, I am running Google Adwords for http://www.arnima.com Currently I am getting overall 7-8% CTR. But I want to know about What the advantages for conversion rate & cost/conversion. What the main benefits to getting cost / conversion. How to calculate ROI. Google Adwords provides any ROI tools or not. What the best CTR for Google Adwords normally. Your suggestion would be appreciated Thanks Sapindia