“So that” is a conjunction that is used to indicate the purpose or reason behind an action in a sentence. It helps improve the clarity of purpose by explicitly stating the intended outcome or goal of the action, making it clear to the reader why the action is being taken.

By using “so that” in a sentence, the writer signals to the reader that there is a specific intention or desired result connected to the action described. This clarity prevents ambiguity and ensures that the reader understands the motivating factor behind the action.

For example, consider the following sentence without “so that”: “I studied hard.” This statement leaves the purpose of studying unclear. However, when we add “so that” to the sentence, it becomes: “I studied hard so that I could pass the exam.” Here, the purpose of studying hard is explicitly stated, highlighting the intended outcome of passing the exam.

In summary, “so that” plays a crucial role in indicating the purpose behind an action or event in a sentence by making the intent clear to the reader. It adds focus and improves understanding by explicitly stating the reason for the action, thereby enhancing the overall clarity and coherence of the sentence.