Most breweries sell through several channels at once: pubs and bars on trade accounts, wholesalers and distributors, festivals and events, a taproom and a webshop. Each channel usually ends up with its own spreadsheet, its own WhatsApp thread and its own version of who the customer is.
A CRM (customer relationship management system) pulls those channels together. Every venue, buyer, distributor and stockist sits in one place, with their order history, credit position, preferences and last conversation attached.
It doesn't replace your brewing or stock system. It covers the commercial side: which accounts are ordering, which have gone quiet, what was promised to whom and where the next case of sales is coming from.
For most breweries, a CRM is where the following live: