RhinoFish - 2:59 pm on Feb 17, 2011 (gmt 0)

by 'Auto bidding', do you mean this setting?
"Automatic bidding to try to maximize clicks for your target budget"

i ask to clarify the difference between automatic control via target or max cpa, enhanced auto assist from conversion data, and the choice i listed above...

if you're aiming for ROI / ROAS goals, good gawd man, don't use "Automatic bidding to try to maximize clicks for your target budget", the translation for this setting is...
try hard to spend all of my money, i don't care about converting

if you're doing a branding campaign, and you've got very deep pockets, there are times when it might make sense - otherwise, it's the ROI marketer's plague.