The "Set Session Properties" node is a component within PingAM authentication trees specifically designed to add or update key-value pairs in the authenticated user's session. After this node executes successfully within a journey, the specified properties become available in the session state. This data can then be retrieved by other nodes later in the flow, used by policy conditions, or passed to applications in tokens, enabling dynamic and stateful authentication experiences.

A. The Get Session Data node: This node retrieves existing data from the session to make decisions; it does not set or add new properties.

B. You have to use a webhook, not a node: While a webhook can interact with external systems, PingAM provides a dedicated, internal node for this common task, making it the direct and correct answer.

C. The Provision Dynamic Account node: This node is used for just-in-time user provisioning into a data store, not for manipulating session state.

PingAM Documentation, "Authentication and single sign-on Guide" -> "Nodes reference" -> "Set Session Properties node". The documentation states, "Use this node to add properties to the user's session. The properties are stored as key-value pairs in the session properties."