If you want to add a column for conversion value per cost after setting up conversion tracking, how does that get calculated?

Conversion value per cost (also known as Return on Ad Spend, or ROAS) is a key metric for understanding the efficiency of your ad spend. It's calculated by taking the total conversion value generated by your ads and dividing it by the total cost incurred for those ads. This tells you how much revenue or value you're getting back for every dollar spent. The other options describe different metrics: Dividing the number in the conversions column by the total eligible interactions calculates your conversion rate. Dividing the total conversion value by the number in the conversions column calculates your average conversion value. Dividing the total cost by the number in the conversions column calculates your cost per conversion.