I have been experimenting with many ad keywords and am finding that Google seems to still be working on their algorithym for how much you need to bid on a keyword, as you change the rate over time the minimum you need to bid may go up.
The best strategy that I have used so far is to drop the minimum bid to 0.03 although I guess nothing stops us from bidding down to 1 cent, and then lots fo your keywords will be presented as inactive with a minimum bid attached to them that is higher than your current minimum. No go and click on the red text saying your bid is too low and you can select Googles new minimum. I have done this only with the keywords that are getting clicks over the last month and seeing what happens with the non converting keywords over time.
Now we can watch over the next few days and see how conversions go, the number of impressions, clickthroughs and clickthrough rates. If you have any feedback please let me know as I am seeing a lot of diverging views on how this will affect our costs per click in the end and I am not sure we will really know for another month or two.
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