Political causes are serious, but the means to influence culture and politics don't have to be.
Social media memes reinforce attitudes and views, sometimes by repeating lies and nonsense, sometimes by succinctly using phrases and visual images to capture and communicate ideas in clever and catchy ways.
No political cause can win without the help of the media and other cultural outlets. In America today, John Oliver, The Daily Show with Trevor Noah, Bill Maher, and Saturday Night Live, and late-night talk shows like Stephen Colbert and Jimmy Kimmel often cut through the crap to educate the public -- or at least provide some perspective -- on issues and events that often go unreported by the "serious" news stations.
Right-wingers have long mastered the art of dominating political narrative through the use of simple and simplistic non-sequiturs and slogans on hats, t-shirts, and bumper stickers. They and their allied Russian trolls use "memes" to promote their lies and undermine political discourse.
Two can play at that game. We may not always be better at it, but we're certainly funnier.