When deciding on the look and feel of your ad it's suggested to
think outside of the box, think creative. If your headline can be visualized, do it! To give you an example, if the headline for a matress-ad is "sleep like an angel", then the picture will be a person in a pyjama holding his teddybear, walking on clouds with a halo above his head. It's a fun thing to do,
visualize your slogans in the adjoining picture. This shows playful creativity, interplay and contrast between slogan and art.
Slack mastered this rule like no other company. With their
straightforward headliner and their image showing a metaphor of how life feels when working more efficiently with Slack. Imagine they used a dull image of some office or a meeting. The creativity aspect brings this ad to life.