You will need this licence if you intend to sell and supply liquor to liquor merchants.
A licensee of a wholesaler's licence may sell liquor for consumption off the licensed premises to members of the general public as well, but it must be supplied in aggregate quantities of not less than 4 litres at a time and the wholesaler needs to maintain at least 90% of the gross turnover from sales of liquor to liquor merchants or persons otherwise authorised to sell liquor.
Generally, this licence allows you to sell and supply liquor for consumption off premises but may allow you to conduct on premises tastings provided you have the necessary facilities and health and planning approvals.