Grassroots movements form coalitions by uniting various community organizations, individuals, and interest groups that share common goals and values. These coalitions typically emerge from shared experiences of inequality or specific grievances, leading to collective action. Leaders within these movements often utilize social media and local events to mobilize support, create awareness, and coordinate efforts. By pooling resources and diversifying their efforts, grassroots organizations can effectively amplify their voice and enhance their influence over policy changes or social reforms.