To do this you need to stir someone’s emotions.
So, get them to love your work or you.
Or, get them to hate your or your work.
So strong agreement or disagreement is important.
Rest all are just tactics.
To that end,
You can do something that is related to a cause
Say something that others have wanted to say for long
Or make something so cool that it makes them look cool or hip
Or give them a way to make it their own and look smart or funny.
It is up to you how you use it to get people to talk about you, your startup, or your cause.