I was confused I get 20 clicks on my ads in adwords but 0 visits. How does it happen? Any explanation from adwords guru here?
Remember that analytics takes 24 hours (roughly) to refresh it's stats. Otherwise it's an error which needs to be reported to one of the Adwords departments so that you can be credited.
Yes, you can see at the bottom of every Adwords page in the small print that updates can take a maximum of 3 hours and then analytics takes 24 hours.