What is the difference between introduction and overview?

What is the difference between introduction and overview?

An introduction is a way for the writer to introduce the topic he is going to write about to the reader. In an overview, the writer gives a brief explanation that is a summery on what he is going to talk about.

What is the difference between an introduction and a literature review?

Introduction introduces the main text to the readers. Literature Review critically evaluates the existing research on the selected research area and identifies...