A Consideration campaign has been running for three weeks and is meeting goals, but underpacing. The campaign uses custom bids, multiple broad ad groups targeting women users, aged 18-24, and broad match keywords. What can the advertiser do to ensure the campaign delivers in full?

Setting the campaign to automatic bidding allows Pinterest's system to optimize bids dynamically to achieve delivery goals within the budget, which is crucial for an underpacing campaign. Custom bids, while offering control, can restrict delivery if set too low or if the auction dynamics change. Adding new Pins might improve engagement but doesn't directly address underpacing caused by bidding. Updating placements to search only would likely further restrict delivery, making it harder to spend the budget. Creating a new campaign doesn't resolve the underpacing issue of the current campaign and would require starting fresh.