Could someone explain to me what the boxes with the numbers from 1 to 15 that are near my ads are doing? Thank you.
That figure is used to calculate how often one of your ads is shown in proporation to your other ads. e.g. if you set advert 1 as 2 and advert 2 as 10, advert 2 will be used 5 times as often as advert 1.