I kept the kw that got impressions and then i removed kw with no impressions.
I let it run for another 3-4 days then i paused kw with no clicks and focused on clicks/ctr.
I make sure to measure kw by how they compare to the average statistic.
For kw that have no conversions but 5-15 clicks i pause.
For kw that have conversions but have a high cost/conversion i lower the max cpc by half.
Currently have a bunch of subscribers but no sales.
Any advice...would help.