A closed promotional budget refers to a predetermined amount of money set aside by a company or organization for the sole purpose of promoting their products or services. This budget is typically allocated for a specific time period and is not subject to change or increase. The purpose of a closed promotional budget is to ensure that the company stays within their designated spending limit and to carefully plan and execute their promotional strategies. This type of budget allows for better control and management of resources, as well as the ability to track the success and return on investment of promotional efforts.