[Jon12345]

It is this specific feature - bid according to ROI - that interests me most. Some of the tools out there let you alter your strategy using a combination of sliders. One can be to minimise costs. This would be great if you were having cashflow issues because you could have the tool auto alter the bids by keeping costs low but the number of conversions as high as possible. One tool I saw that did this was quite expensive, with over $1000 per month as a starting point + fees. Great for an agency, too expensive for me.

Alterting a bid 12 times per day is just one option. You can do it once every 48 hours if you like. It was just an example.