There are a number of ways to learn how to write an introduction for an essay but the best piece of advice in helping you create the ideal introduction is to understand the function of the introduction. It exists to introduce the reader to the topic. Imagine it is like one person introducing two people who do not know each other. You, the writer, have created an essay. The reader of the essay, possibly your tutor or professor, has not seen this piece of prose beforehand. It is all new to them. You are the one conducting the introduction.
There are educational institutions such as colleges and universities that offer writing support. They may have websites that detail how to write an introduction for an essay. Some offer sample introductions via PDF format. Others may have essays on their site you can read. You can access a few sites and compare material.
5 Major Mistakes: How to Write an Introduction for an Essay -