Topic markers are words or phrases that indicate the subject or main idea of a sentence or conversation. They help listeners or readers understand what the discussion is about, making it easier to follow the flow of information. Common topic markers include phrases like "regarding," "concerning," and "as for." In written and spoken communication, using topic markers can clarify the focus of a discussion. For example, when discussing climate change, one might say, "Regarding climate change, we need to consider its impact on biodiversity." This approach helps organize thoughts and enhances comprehension.