As for the meaning of Salafi, indeed he is the one who is steadfast upon the Book and the Sunnah according (to) the understanding of our Pious Predecessors (Salaf as-Saalih).
The sources of knowledge according to the Salafis are: the Book of Allaah, the Sunnah of the Messenger of Allaah (sallaahu alayhi wa ‘ala Aalihi salam) – they do not have any leader except for the Messenger of Allaah (sallaahu alayhi wa salam) – so this is a distinction of the People of Hadeeth, the People of the Sunnah and the Salafis: because the meaning of the three (previous terms) lead to one meaning, upon that, it is possible to be Salafi but not a scholar of Hadeeth, it is possible to be Sunni also and not be a scholar of Hadeeth, and possibly be a scholar of Hadeeth and he is dotard. And possibly a scholar of Hadeeth and he is an open sinner, for example: Sulaymaan bin Dawood ash-Shaathakoonee (Shadhkuni) Aboo Ayyoob, and likewise Muhammad bin ‘Umar al-J’aabee (Juba’i), and others, it is possible to be a great memorizer (of Hadeeth) and be accused of despicable matters, And we seek Allaah’s aid.