meanwhile
Marketing for people currently doing five other jobs.
There is no spare person called marketing. There is you, the business, the customers, the staff, the messages, the books, the supplier problem, and whatever happened this morning.
Meanwhile is for the marketing that still needs to happen anyway.
It finds the useful things already inside the business and turns them into work worth checking: ads, campaigns, content angles, and next moves.
You keep running the business. Meanwhile keeps the marketing moving.