how are taraweeh prayers performed?
When praying Taraweeh, once you've prayed your two-by-two rak'at, you need to round it all off by praying a two rak'at of Shafaa and a raka'h of Witr. For example, if you pray 12 rak'at of Taraweeh, then conclude with two rak'at of Sahfaa, followed by one rak'at of Witr to make it 15 rak'at in total.