In the month before Christmas, my sponsored ad was shown to 1380 people. 5 clicked on it, none bought it.
Lock screen campaign #1 has been seen by 11,495 people. 37 have clicked, none have bought
Lock Screen campaign #2 has been seen by 18,834 people. 73 have clicked, none have bought.
In all, 31,709 people have seen my ad. 115 have clicked on it, and none have bought it.
I pay per click, so I have spent a total of $52.75. The pricing is weird. I bid how much I am willing to pay per click and they charge me less. I have no idea how they determine the amount.
So, is it worth $52.75 to have almost 32,000 people see my book even if they don't buy it? Approximately 1/3 of 1% of those who saw my ad clicked. Is that good or bad? Clicking and not buying probably means they looked at the first couple pages and decided it wasn't for them. That's fine.