Budget and bidding
Your daily budget caps what a campaign spends per day. Your bidding value sets how competitively it bids. Both are set in Step 2 under More settings, and both can be changed on a running campaign.
Daily Budget
HUB describes it as your average daily budget for this campaign. Minimum daily budget: $360, which keeps bids competitive enough to reach high-intent audiences.
It applies per campaign, so three campaigns each at the minimum spend three times that amount daily.
Bidding
The field reads viewable CPC bid for this ad group. Default bidding value: 2. A starting CPM of $7 to $8 gathers data quickly and builds audiences for retargeting.
The two do different jobs
Budget decides how much you spend. The bid decides whether you win the impression at all. A healthy budget with a bid too low to compete will underspend, and that reads as a budget problem when it is not one.
Change one at a time, so you can tell which one moved the result.
Your balance funds all of it
Your prepaid balance funds all campaigns. When it runs out, campaigns pause, so keep it topped up to avoid losing learning-phase momentum.
