Definition
A partner program is the formal set of rules, benefits and requirements a vendor uses to work with outside partners. It defines partner types, tiers, discounts, deal registration, marketing funds, training and support. It gives partners a clear picture of what they get and what they must do.
Most programs have separate tracks for different partner types, such as resellers, service providers, referral partners and technology partners.
A program on paper is only a starting point. Partners judge it by how easy it is to use, how fast the vendor responds and whether the money is worth their time.
In practice
A vendor's partner program offers a referral track with a flat fee and a reseller track with tiered discounts, deal registration and MDF.