Simplify the following text for a Grade 12 native English-speaking person.
Original: In British , Australian , New Zealand , Italian , and some Canadian universities , a tutor is often but not always a postgraduate student or a lecturer assigned to conduct a seminar for undergraduate students , often known as a tutorial .
Simplified: In British , Australian , New Zealand , and some Canadian universities , a tutor is often but not always a postgraduate student or a lecturer who conducts a seminar for undergraduate students . These seminars are often known as a tutorial .