What is the primary purpose of parentheses in writing?

The primary purpose of parentheses in writing is to enclose supplemental information. This added information can provide clarification, examples, or additional details that are relevant to the main text but not essential to its overall understanding. By using parentheses, writers can present this extra content in a way that doesn't interrupt the flow of the main message, allowing readers to grasp the core ideas without being distracted by additional notes. This use of parentheses helps to improve the clarity and richness of the writing by offering context or elaboration, which can enhance the reader's understanding of the topic.