Final answer:
The Muckrakers raised public awareness of social problems, leading to social reforms during the Progressive Era.
Step-by-step explanation:
The Muckrakers had an impact on society because they made the public aware of social problems. These journalists and writers highlighted a variety of issues afflicting American society during the Progressive Era, such as child labor, corruption, poor working conditions, and unsafe living conditions. Their expositions in magazines and books garnered public attention and led to increased support for various reforms. The importance of muckraking lies in its role in informing the public and spurring legislative changes as well as the broader reform activities of the Progressive movement.