Web design is the planning and creation of websites. This includes a number of separate skills that all fall under the umbrella of web design. Some examples of these skills are information architecture, user interface, site structure, navigation, layout, colors, fonts, and overall imagery.

The term used for the targeted, measurable, and interactive marketing of products or services using digital technologies to reach the viewers, turn them into customers, and retain them.

You have to create a structure of the user interface, transitions, and interactions. It must be based on market research, user research, competition, and strategy. You can use wireframing software or you can create a simple outline on a paper. Lay down the user flow as you want it to appear on the actual app.