Definition
Multi-node routing is a specific form of fan-out where a single event is delivered to multiple destinations of the same type. For WordPress forms, that typically means writing the same submission to several Google Sheets simultaneously - a master agency sheet, a per-client sheet, a per-brand sheet, a regional sheet. Each sheet is owned by a different stakeholder who wants their view without touching anyone else's.
Multi-node is different from conditional routing (which chooses one destination from many) or CRM fan-out (which writes to different system types). It is a multiplication of the same write to several destinations of the same type, often with different column subsets based on who owns each sheet.
How SheetLinkWP relates to Multi-Node Routing
The Multi-Node Routing add-on for SheetLink Forms lets you configure multiple Google Sheets destinations per form and choose which fields go to each. An agency might configure their master sheet to receive every submission with every column, while each client sheet receives only submissions routed to that client and only a subset of columns (no internal notes, no cost fields). Deliveries run in parallel; one slow sheet does not block the others.