A milestone is basically a checkpoint in a project where a specific part of the work is expected to be done. Most platforms do not automatically detect when a milestone is complete. Instead, the freelancer submits the work and the client reviews it, then approves the milestone and releases the payment for that stage. The platform acts as a middleman holding the funds until approval is given. If the client does not respond, some platforms have a system that auto-releases payment after a set number of days. How has milestone tracking worked for you in past projects?