The total amount of money you've spent on your campaign group, campaign, ad set, or ad during its schedule.
The amount you spent on ads impressions or interactions.
Snapchat
The total amount spent on your Ad Campaign to date.
Google Ads (cost)
The sum of your CPC and CPM costs during this period. Values can be one of:
A money amount in micros
"Auto: x" or "auto" - if this field is a bid and Google Ads is automatically setting the bid via the chosen bidding strategy
"--" If this field is a bid and no bid applies to the row.
TikTok
The estimated total amount of money you've spent on your campaign, ad group or ad during its schedule.
The total amount you've spent so far.
Total amount you've spent during the reporting time period.