question #3 Sahih Muslim 512b, Book 4, Hadith 303 : What is the role of the Witr prayer in the nightly prayers of a Muslim?

The Apostle of Allah (ﷺ) said his whole prayer (Tahajjud prayer) during the night while I lay between him and the Qibla. When he intended to say Witr (prayer) he awakened me and I too said witr (prayer).