Final answer:
The start date for a client on their ClickUp profile is added on the 'Start' day. It helps track progress and deadlines.
Step-by-step explanation:
The start date for a client on their ClickUp profile is added on the 'Start' day. In ClickUp, tasks and projects can be assigned start dates, and the 'Start' day indicates when the client's work or project begins. By setting the start date on their ClickUp profile, the client and their team can track progress and deadlines more effectively.