I am using the API to understand the performance of Adwords ad campaigns. I need to know how to attribute metrics back to the date dimension.

For instance, for a given date, if I have 20 clicks, 18 visits, and 3 goal completions, does it mean that: 1) All of these actions happened on the day in question and are otherwise independent (meaning that the 3 goals could have been for people that clicked any time in the past 30 days, not who clicked on that day) 2) The on-site actions are a subset of the click activity on that day (i.e. on that day, 20 people clicked, 18 registered a real visit, and 3 completed a goal)

If it is scenario 2, does that mean there is a need to refresh old rows every day?

Thanks!