A campaign takes a long time to win; one action is just a small part of it
A campaign is like a long-term strategy but more detailed, conscious, and intensive; it requires active upkeep by a persistent activist group. As Ivan Marovic writes, "Unlike strategy, [campaigns] need to be detailed, their objectives specific, their targets well defined, and their messages clear and straightforward. Campaigns must correspond to changing environments but must also support the long-term strategy. And since it takes time for campaigns to have an effect… you must wait months before making changes based on an evaluation of the campaign’s effectiveness."
Although tactics like ours (or the thousands within Actipedia) can contribute to long-term and short-term change through their sheer existence, only campaigns bring about change with any reliability.