poster_boy - 2:20 pm on May 15, 2006 (gmt 0)

Standard: Show ads evenly over time Accelerated: Show ads as quickly as possible

If your budget cap is *less* than the amount you'd naturally spend if you had an unlimited cap, Standard will "smooth" your budget over time (i.e. ads will run throughout entire time period, but at a slowed pace) while "Accelerated" will blow through your budget as quickly as possible (i.e. ads will run at full strength, but will be deleted prior to end of time period).