This brief article will discuss some of the personal Islamic terms you may hear.
Most recognizable term is the Sheikh. A Sheikh is a knowledgeable Islamic scholar who usually has high standards in Islam. They usually host lectures, give fatwas, and classes.
A Ustadh is a Muslim who has graduated in Islamic Studies, and usually are ready to begin their work in teaching Islam to others across the globe.
Finally, a Salafi is one who follows the way of the Salaf; commonly said to be "the pious predecessors". A Salafi imitates everything the Salafs did in their time.
Now you know the meanings of these Islamic terms. I hope you found this beneficial insha-allah!
May Allah bless you, and shukran.