Marketing is, or probably as broad as design.
In Marketing, there is, digital, analogue (old timer), personal, content creation, packaging, etc. Similar to Design too.
Marketing boils down to two basic concepts;
In most cases, a designer's task is to amplify marketing.
Before you can amplify, you need to understand the context, history and future of the materials provided. These questions have to be asked by yourself.
The two coincide with the user or target market.
We do marketing to attract the target market, we do design to make users stay. That's how Marketing works in Design.
Have you heard the expression ...
Design is subjective.
Hard to break it to you, but the design is actually objective.
You are supposed to see what I see and react to it the way I do.
What may look good to me, may not look good to you. It boils down to three basic things,
Our culture shapes our thinking and conditioning. For example, my African friends find that the colors Red, Green and Yellow are the best combos. I find it otherwise.
Kids born rich and poor have different tastes in design. Rich probably wants the simplest form of car, while the poor thinks adding more chrome to the car makes it tasteful.
How we live our day-to-day life changes our perspective on design. If you live like a dump (messy rooms), you'd likely prefer a crowded design. While the symbol of luxury is defined by light and space.
Design preferential is nothing new. The first step is to agree, who are we building this for?
Once you've agreed on this, it's easier to understand the kind of design that is suitable for your target market.