A managed package is designed for distributable Salesforce solutions whose components can be maintained and upgraded by the package provider. Salesforce states that managed packages provide fully upgradeable application resources, and AgentExchange guidance distinguishes them from unmanaged packages by specifically noting that providers can automatically upgrade managed solutions. This makes a managed package appropriate when Universal Containers wants a complete preconfigured application while minimizing ongoing manual maintenance. An unmanaged package provides editable components but does not have the same provider-managed upgrade mechanism; receiving a newer unmanaged version generally requires replacement or reinstallation. A change set transfers metadata between related Salesforce orgs and is not an AgentExchange distribution package. A data kit is not the package type used to deliver an upgradeable Salesforce application.

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