The Begin node is placed at the beginning of a journey and its settings can be configured to control how the journey begins.
Settings
One per Profile: If you start a journey for selected participants, and start the journey again a second time, you will not be able to filter which participants have had their journey started already. To avoid a participant having multiple journeys started, you can select for only one lead to be created for each profile.
Initial Goal: When starting a journey manually, this setting will specify this node as the default starting point.
Direct only. This will set the journey to ONLY start manually by clicking the Start button, or when sending a group email with the relevant configuration.