Which aspect is crucial for effective note-taking during lectures?

Identifying main ideas and key details is crucial for effective note-taking during lectures because it allows students to distill the most important information from the presentation. Effective note-taking is not about transcribing every word but rather about capturing the essence of the lecture—what the speaker deems most significant. By focusing on main ideas, students can create a structured and coherent set of notes that will be useful for studying later. This approach helps in retaining information as it encourages active engagement with the material, making it easier to understand and recall the concepts discussed. Additionally, emphasizing key details supports a deeper understanding by providing context and examples that illustrate the main ideas.