Many Muslims get confused between the general term of Sunnah, which includes all the sayings and actions of the Prophet, and between the term Sunnah when used in fiqh issues where it means ”recommended”. For example, since the Prophet used to pray 2 rak’at before fajr prayer, we say that it is Sunnah for us to pray these 2 rak’at, which means that it is recommended to pray these 2 rak’at and not obligatory.
Therefore, when we say it is obligatory to follow the Sunnah, we are talking about the Prophets commands for us in the Sunnah and not about the recommended actions such as the 2 rak’at before fajr for example. Please make sure that you understand the difference here.
Basically means that the Sunnah can be used as evidence in Shariah, and that Allah (swt) has ordered us to follow the Sunnah and avoid anything it has prohibited for us. In other words, this means that it is obligatory on every Muslim to believe in what the Sunnah tells us, and to act according to the Sunnah in all aspects of our life and ensure that we do not commit any actions that contradict the Sunnah.
The Sunnah that confirms what is in the Qur’an, and reinforces it.
the Sunnah explains the holy Qur’an and the various Shariah injunctions that come in the holy Qur’an. It includes four parts: expanding on what is mentioned only briefly in the holy Qur’an, explaining difficult verses or issues, putting limits on general statements in the Qur’an and finally specifying generalities in the Qur’an.