Next week the Autobroker function will be activated for all phrases in all Direct ad campaigns. It helps you save money on each click: the system itself lowers the set Cost Per Click to such a value that is sufficient to display ads at the desired position. This means that you don't need to manually lower bids if the CPC for the desired position drops.
For the past few years, Autobroker used to be an option that could be switched on and off manually. In this time it has proven its effectiveness in any campaign with any parameters, so that's why it is now part of the required settings in the system.
More information about how Autobroker functions can be read in the help section.