Hello @Webprofits,
Welcome to the Klaviyo Community!
Great question! The “% of Days With a Campaign” benchmark refers to the percent of days with a campaign sent from your account.
For example, if you had campaigns sent 20-days out of a 30-day month, that benchmark result will be 67% (20/30).
Checkout both our Understanding peer groups, benchmarks, and how Klaviyo uses your data and How to use benchmarks reports Help Center articles to learn more about our benchmarking tool and some use cases.
I hope this helps!
David