Flows are made of nodes and connections. There are several different types of nodes with different properties.
 

Flow control nodes

These nodes are not displayed to the user and the user does not interact with them. They instead control how the assistant moves through the flow.

User interaction nodes

These nodes are displayed to the user and the user does interact with them. The user will be guided through the flow based on the input received in these nodes.

Advanced nodes

These nodes are not displayed to the user, but will perform an action based on input from the user on previous nodes.