The transitional phrase "so that" is most commonly used in causal or purpose-driven interactions. It serves to connect two clauses where the second clause expresses the purpose or result of the action in the first clause. For example, you might use "so that" when explaining reasons for actions in conversations, writing, or presentations aimed at clarity or explanation.
Example: "I studied hard for the exam so that I could achieve a high score." Here, "so that" links the action of studying with the intended outcome of achieving a high score.