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Webchat here just means the ChatSyncs Chat Widget — the chat button on your website. Its conversation builder is the same canvas as Keyword Replies, so a User Input Flow works inside it exactly the same way it does on WhatsApp. Example: A visitor opens the chat widget wanting a quote. Instead of one generic message, an Input Flow asks step by step — Name, Service Needed, Budget — validating each answer before moving to the next, then saves it all to Custom Fields.
Chat Widget conversation canvas with a User Input Flow block
1

Build the widget's flow

Follow Chat Widget to create the widget and open its conversation canvas.
2

Add a User Input Flow block

Drag on a User Input Flow component the same way as in User Input Flow, chaining questions together.
3

Save and publish the widget

Save the flow, then confirm the embed code is live on your site.

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Frequently asked

Yes — it’s the same canvas and the same User Input Flow component, just running inside the Chat Widget instead of a WhatsApp conversation.
Saved as Custom Fields on the subscriber’s profile, the same as any other Input Flow submission — see How Do I Manage Custom Fields and Labels?.