Has anyone successfully used the ad scheduling function in adwords, for either content or search to improve profits, and/or eliminate unprofitable times. Is there a sweet spot in time that seems to do much better, and a time that does much worse? I have considered using this function, but would be interested in hearing some real life success stories.
The ad scheduling allows you to turn your ads on and off for every day of the week.
I've used ad scheduling to save lots of money. I only run ads from 11am-11pm eastern time. Since we're B2B, we like to try and keep it to those who would most likely be purchasing during business hours, because we've found absolutely zero conversions over the weekend or between the hours of 11am-6am. The clicks we have recieved during these "off hours" have been worthless as far as I can see, although a few have come from fraudsters looking to steal our products.
I save money when i turn on ad scheduling because i'm not paying for some guy on the other side of the world who is just surfing around, or some business manager who is doing research right before bed rather than at his desk in the morning. I've found success.
The best way you can determine the best times is to test. Keep your ads running as often as your budget will allow for a time and then take a look to see where your majority of clicks (and conversions) happen. Take those times and turn on your ad scheduling for those times. Pretty simple, although it never hurts to turn off ad scheduling periodically to make sure you're still scheduling the right times.
I have also used ad scheduling successfully for a client with a limited budget. For weekdays, ads ran 11:00am to 5:00pm and 7:00pm to midnight (avoiding drivetime). Sundays 10:00am to midnight. As this was a consumer product I found Sundays to be the best day in terms of clicks.