Mobile Bid Adjuster
What performs better.. Mobile or desktop? If you can answer this then you probably have a good idea of what bid adjuster you should be using. Mobile performing through the roof? Up the adjuster. Mobile tanking a little, reign it in or shut it off completely.
What you can do to fix it:
Use conversion data to understand where your adjuster should be. Need the extremes? There are 2 numbers you should remember, -100% and 300%.