Interest groups lobby to influence legislation by representing specific interests, advocating for policy change, and providing expertise to lawmakers. They utilize various strategies, including direct lobbying, funding political campaigns, and mobilizing grassroots support to sway public opinion and political decisions. Through organized efforts, interest groups can amplify their voices in the political arena, shaping legislative agendas to align with their goals. However, this practice raises concerns about the disproportionate influence of wealth and access, potentially leading to policy outcomes that favor a few over the broader public interest.