explain sunnah in briefsunnah is a kind of itikaf

When one talk about sunnah, he or she needs to talk about
the Prophet, Muhammed's deeds, words and the things that he agrees about or the things
that he leaves open. This means that sunnah is the second source of Islam. In this part,
the Prophet explains everything concerned the Holy Quran. He also guides his followers
towards the good deeds. By doing all what the Prophet, Muhammed, says, people will do
what Allah wants or asks for.

Of course when doing what is
sunnah, Allah will reward you. But if do not do what is sunnah, like performing two
Rukaas after Zhur Salah, you won't be rewarded or punished. Therefore, to feel happy and
content, you had better do what is called sunnah.