The most likely outcome of the successful actions of an interest group is that the government changes its policies on a subject the group cares about. An interest group, also known as a special interest group or pressure group, is an organization that seeks to influence public policy by advocating for specific causes or interests. Interest groups can use a variety of tactics to influence policy, such as lobbying, campaigning, and media outreach. When an interest group is successful in achieving its goals, it is likely that the government will change its policies on a subject the group cares about. This is because the government is responsive to the views and concerns of its citizens, and will often take action when it perceives that a significant number of people support a particular cause. Therefore, the most likely outcome of the successful actions of an interest group is that the government changes its policies on a subject the group cares about.