Final answer:
The chief goal of grassroots lobbying by interest groups is to influence decision-makers and public policies in their favor, by generating public support from the ground up and using varied tactics including 'Astroturfing' to sway opinion.
Step-by-step explanation:
Chief Goal of Grassroots Lobbying by Interest Groups
The chief goal of grassroots lobbying efforts by interest groups is to influence decision-makers and public policies to align with their interests and goals. This is done by generating public support at the most basic level in society which then moves upwards to affect policymakers and legislation. Tactics used in grassroots lobbying include organizing marches, demonstrations, and high-profile events that depend on high levels of voluntary participation. Another modern technique is "Astroturfing", which creates artificial grassroots movements to simulate public support that is not originally from the grassroots level but is instigated by the interest group to sway public opinion and policymakers.
Moreover, interest groups aim to influence legislative proposals that affect their goals by lobbying Congress, state legislatures, and even the executive branch. They educate the public, support favorable candidates, participate in lawsuits, and seek media attention to meet their policy objectives.