What is the purpose of Milestones tab in contract lines and how to utilize it?

Summary:

Recently 'Milestones' tab has been appearing in Contract line details, and can someone please share some insights on how to utilize it.

Is it to say that future milestone billing events for projects for which we can enter events on milestone based?

If yes, we already have a place for it to create events with future date in events page right. Any specific documentation explaining functionality about this feature please.

Thank you, Suresh

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