A Supplier is an entity (company or organization or physical person) that you receive/purchase products from.
A Client is an entity (company or organization or physical person) that you ship/sell products to.

The supplier must be chosen prior to creating a Purchase Order or a Goods Inbound document.

Similarly, a client must be chosen prior to creating a Sales Quote, a Sales Order or a Goods Outbound document.

The Contacts that are defined under a supplier or a client can be viewed and updated by clicking the contacts icon next to the respective supplier or client name.

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