To write a good essay for TOEFL, you need to pay close attention to the structure of the essay. The first paragraph should introduce the topic in a general way and briefly discuss why it is important. The second paragraph should be devoted to an example of something that illustrates what is being discussed. The third paragraph should contain a conclusion that summarizes the main points of the essay.

The following are some guidelines for writing an effective essay:

- Be concise and stay on point

- Provide examples

- Use transitions that help readers understand your ideas

- Avoid using too many words or phrases that are not relevant to your argument