A sales plan is a strategy that sets out sales targets and tactics for your business, and identifies the steps you will take to meet your targets.
A sales plan will help you:
define a set of sales targets for your business
choose sales strategies that are suited to your target market
identify sales tactics for your sales team
activate, motivate and focus your sales team
budget and clarify steps you'll take to achieve your targets
review your goals periodically and improve your approaches to sales.
A sales plan sits within, or alongside, a marketing plan to direct the efforts of your sales team.
Most businesses develop or update sales plans periodically - every 6 or 12 months. Treat your sales plan as a 'living' document that you can revise regularly.
This guide explains the importance of having a sales plan, and will help you develop, implement and review your business's sales plan.
Source: https://www.business.qld.gov.au/running-business/marketing-sales/sales/sales-plan