The forward calendar decides what a campaign is for
Hospitality marketing has an unusual advantage over most industries: the property knows in advance which dates are in trouble. The forward book shows a soft midweek in three weeks, a shoulder season fortnight, a banquet calendar with two open Saturdays. Every campaign should be answering one of those specific problems, which immediately makes the audience question tractable, because you are no longer asking who might want an offer but who travels on those particular dates.
Properties that market without reference to the forward book end up doing the opposite: broadcasting a general offer that discounts dates which would have filled anyway, while the soft week stays soft. That is not a marketing failure so much as a coordination one, and it is solved by the revenue desk and marketing looking at the same calendar once a week.