Who you buy from, with their contact details and payment terms.
Deactivating replaces deleting
A supplier is not removed; it is deactivated. The row stays so past purchase orders can still resolve its name.
A deactivated supplier is not offered when raising a new order, but its history is untouched. It can be reactivated whenever needed.
The default supplier is the key to reordering
A reorder suggestion is only produced for an item that has a default supplier. An item below its reorder point with no supplier set produces nothing at all.
If an item never appears on the Reorder page, check that first.
The CRM contact link is optional
A supplier can be linked to a CRM contact so the correspondence sits in one place. The link has no effect on purchasing or stock; it exists to join the records.
Supplier spend counts only completed orders
The figure shown per supplier is the sum of the orders that have been fully received. Drafts, orders sent but not yet arrived, and even partially received orders are all absent from it.
So a large purchase still in transit does not show here — that is the definition rather than an undercount.