Answer:
You can be better prepared for what is coming later on in the essay.
You can better judge the effectiveness of the author.
Step-by-step explanation:
The first benefit of identifying the text structure of an essay is that it prepares you for what is going to come in the future. By looking at the structure of a text, you can predict the topic and the structure of each paragraph. This means that you will be prepared for the way the information flows, and you will be more likely to understand it.
The second benefit of identifying this structure is that it allows you to judge the effectiveness of the author. The author of the text will most likely state what it is he wants to accomplish in his text. By understanding the structure, you will better identify claims, counterclaims and rebuttals. This will allow you to decide whether the author was successful in proving his thesis.