Why are supporting details important in understanding main ideas?

Supporting details are crucial in understanding main ideas because they provide evidence and examples that elaborate on and reinforce the core message being conveyed. By clarifying the main ideas, they help readers grasp the context and significance of those ideas more thoroughly. Without supporting details, the main ideas may seem vague or unsubstantiated, making it difficult for readers to appreciate their importance or relevance. Thus, supporting details enhance comprehension by giving readers a more comprehensive view of the topic, illustrating connections, and helping to solidify the primary messages presented in the text.