"update data" declares variables in a flow or updates them. Depending on how you do it they are local variables (within a task) or global (flow.variablename).
"set participant data" writes variables to the participant in an interaction. There they are stored under participant[].attributes. You can use this feature together with "get participant data" to transfer data beteween different flows. Please note, that attribute-names in participant data are case sensitive and must be spelled exact the same way in both flows.
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Christoph Domaschke
Leiter Service Center (Cronbank)
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