This function allows you to add people on the fly as you like at anytime to enter your automation...
You can now import a CSV or selective prospect from Linkedin to my contacts From there you are able to enroll them into an Automation. Secondly if you export searches to my contacts (they enter their by default) you can select who you like on the fly to enter an automation as well... Just Like this
The automation does need the starting point "My Contacts" which will be a rolling event based starting point based on when you are adding people into the step.