A tutor, formally also called an academic tutor, is a person who provides assistance or tutelage to one or more people on certain subject areas or skills.
The tutor spends a few hours on a daily, weekly, or monthly basis to transfer their expertise on the topic or skill to the student. Tutoring can take place in different settings, such as a classroom, a formal tutoring center, or the home of the tutor/learner.
As a teaching-learning method, tutoring is characterized by how it differs from formal teaching methods on the basis of the (in)formality of the setting as well as the flexibility in pedagogical methods in terms of duration, pace of teaching, evaluation and tutor-tutee rapport.
Tutoring began as an informal and unstructured method of educational assistance, dating back to periods in Ancient Greece.
Tutors operated on an ad-hoc or impromptu basis in varied and unfixed settings wherein the main goal of the tutor was to impart knowledge to the learner in order to help the latter gain proficiency in the subject area.
Methods of tutoring only began to become more structured after the 20th century through focus and specialisation in the training of tutors, application of tutoring, and evaluation of tutors.
From the 20th century onwards, with the rapid spread of mainstream education, the demand for tutoring has also increased as a way to supplement formal education.
Source : Wiki