I'm trying to figure out how many impressions and clicks I need to make decisions with. I feel stupid asking, but can somebody point me in the right general direction? I vaugly recall confidence intervals from accounting but not how to calculate them.
You can get an wide picture of your campaign after 500-1000 clicks,not impressions. I prefer 1000 clicks for a more reliable picture of my campaigns,but also with 500 clicks you can get a good campaign picture.
I like to use about 3 - 7 days worth of data, depending on how many clicks are coming through per day. You can probably start making decisions around 200 - 500 clicks.