Anyone who's dealt with big campaigns with lots and lots of keywords can breathe a sigh of relief this morning. You can now put negative keywords at Campaign level as well as at ad group level.

AdGroups tend to be structured together in logical campaigns based around product groups such as "Fridges" or brands such as "Yamaha". Typically there will be a bunch of negative keywords that apply to all keywords in a campaign. Taking a Yamaha Bike Dealer as an example, he/she may want to put negatives that prevent his ads being show for other Yamaha products such as "Drums","Keyboards", "Sewing machine". These negatives apply to all his/her ads within the Yamaha group not just one or two isolated ad groups. Now these can be put at the campaign.