Answer:
It gave the minority religious communities limited power to deal with their own affairs, but the Ottomans held the overall supremacy
Step-by-step explanation:
This would have helped them keep the empire together. Trying to control the entire country (Fully) at once and with how diverse it is can be hard to keep it together. An example, the Roman Empire and their inevitable decline. With separate governing bodies, with the oversight of the Ottomans, helped keep the empire together. This is probably why they lasted for a little over 600 years.