Assign Object Owners on List membership

Select the HubSpot Object on which you want to perform the Weighted Round Robin i.e. Owner Assignment, you can select the owners from the provided dropdown, on the next column you can select the number. Now whenever a object is created Owner Assignment will work according as per your selected owners.

Create Workflow

On the setting page you will see the dropdown list that are associated with respective object, select any of the list on whom you want to run round robin. There is button below Create Workflow that will create Workflow with the trigger criteria as the list selected.