Ablution, i.e. Wudu’ means cleanliness and brightness. But in Islam it refers to washing the face, arms, head and feet with clean water. In other words it is called ablution. It is obligatory before prayer or similar worship acts.
Bid’ah has always been known by most to be something negative. Anything the Prophet (ﷺ) did not do or Allah (SWT) has not instructed us to do, we must not do any of it. However, scholars have discussed in regards to differentiating between a ‘good Bid’ah’ and a ‘bad Bid’ah.'