Answer:
Grab others’ attention
Explanation:
A social media campaign is simply creating awareness for something or someone. This heavily relies on getting the attention of people in a number of different ways so that they can engage your content.
Therefore, the action will help make a social media campaign successful would be to grab others’ attention
It's meant to give off an ominous feeling, or like someone is doing something wrong. The dark colors and lurking actors give it more of a creepy, dark, and ominous feel.