In the age of instantaneity and information overload, platforms like Twitter have emerged as unexpectedly potent drivers of social change. This paper delves into the intricate relationship between Twitter and social causes, exploring how its unique features and expansive reach have amplified the voices of advocates and activists, shaped real-world movements and influencing public discourse. From harnessing the power of hashtags to organizing flash mobs, from mobilizing communities to challenging power structures, Twitter has become a critical tool for raising awareness, galvanizing action, and holding decision-makers accountable. This paper, however, will not shy away from examining the inherent limitations and potential pitfalls of Twitter activism, such as the formation of echo chambers, the weaponization of virality, and the challenges of sustaining momentum beyond the digital realm.