In a famous hadith we have that every innovation is an error.
It was narrated that Jabir bin 'Abdullah said: "In his Khutbah the Messenger of Allah (ﷺ) used to praise Allah as He deserves to be praised, then he would say: 'Whomsoever Allah (SWT) guides, none can lead him astray, and whomsoever Allah sends astray, none can guide. The truest of word is the Book of Allah and best of guidance is the guidance of Muhammad. The worst of things are those that are newly invented; every newly-invented thing is an innovation and every innovation is going astray, and every going astray is in the Fire.' Then he said: 'The Hour and I have been sent like these two.' Whenever he mentioned the Hour, his cheeks would turn red, and he would raise his voice and become angry, as if he were warning of an approaching army and saying: 'An army is coming to attack you in the morning, or in the evening!' (Then he said): 'Whoever leaves behind wealth, it is for his family, and whoever leaves behind a debt or dependents, then these are my responsibility, and I am the most entitled to take care of the believers.'" Sunan An-Nasai 1578
In another hadith we have the virtue of introduction of good practice in Islam.
Jarir b. Abdullah reported that some desert Arabs clad in woollen clothes came to Allah's Messenger (ﷺ). He saw them in sad plight as they had been hard pressed by need. He (the Holy Prophet) exhorted people to give charity, but they showed some reluctance until (signs) of anger could be seen on his face. Then a person from the Ansar came with a purse containing silver. Then came another person and then other persons followed them in succession until signs of happiness could be seen on his (sacred) face. Thereupon Allah's Messenger (ﷺ) said: He who introduced some good practice in Islam which was followed after him (by people) he would be assured of reward like one who followed it, without their rewards being diminished in any respect. And he who introduced some evil practice in Islam which had been followed subsequently (by others), he would be required to bear the burden like that of one who followed this (evil practice) without their's being diminished in any respect. Sahih Muslim 2673
What am I missing? I think it is in the translation of the words "Innovation" and "Introduction", how do I understand this and explain this to a non Arab? Jazak Allah.