UX and UI: what they are and their main differences

Today, every interaction with a website, an application, or an online platform matters. For this reason, it is important to understand what UX is and what UI means. Because it is not just about design, but about building experiences that generate value and make users want to come back. A well-designed user experience can significantly increase customer conversion and improve loyalty. In a market where competition is just one click away, companies that invest in good UX and UI design attract more customers and build longer-lasting relationships.

What is user experience (UX)?

User experience (UX) is the overall perception a person has when interacting with a digital product or service. It refers to how they feel, how easy it is to use, and whether it meets their expectations. A good UX design aims to answer several questions.

• Is it easy to use?
• Can I quickly find what I need?
• Do I feel satisfied after completing the action I wanted?

Imagine entering an online store: if the search process is fast, the information is clear, and checkout takes seconds, that is well-applied UX. On the other hand, if the website is confusing, slow, or insecure, the user will leave before buying.

So, what exactly is UX? We could summarize it as designing with people in mind, prioritizing their comfort, safety, and satisfaction.

What is user interface (UI)?

While UX focuses on the overall experience, user interface (UI) focuses on the visual and graphical aspects that enable interaction. In other words, it includes different elements.

• Typography, colors, and visual styles.
• Buttons, menus, and navigation bars.
• Icons, animations, and micro-interactions.

We can say it is the face of the digital product, the first thing the user sees and what invites them to interact. If UX is the structure of a house, UI would be the decoration: the color palette, furniture, and lighting that make it feel welcoming.

What are the differences between UX and UI design?

UX and UI are often treated as the same thing, but they are not. However, they work best when combined:

• UX (user experience). Optimizes usability, accessibility, and user satisfaction.
• UI (user interface). Focuses on aesthetics, interactivity, and visual design.

A product can be visually attractive, but if it is not functional, it will fail. Conversely, a useful platform with poor visual design will not engage users.

Today, thanks to tools such as Figma web, UX and UI designers can collaborate in real time, creating prototypes that combine usability and graphic design to validate ideas before launch.

Main responsibilities of a UX/UI designer

The work of a UX/UI designer goes far beyond creating attractive interfaces. Their main mission is to ensure digital products are useful, accessible, and provide a positive user experience. To achieve this, they combine creativity, data analysis, and human-centered design methodologies. Their main responsibilities include:

• User research (UX Research). Understanding the needs, motivations, and behaviors of users through interviews, surveys, or usability testing.
• Information architecture. Structuring and organizing content in a logical way to make navigation clear and intuitive.
• Wireframing and prototyping. Creating sketches and early versions of digital products to validate ideas before final development.
• Visual design (UI Design). Defining the aesthetic appearance of the interface (colors, typography, icons, buttons, etc.) ensuring consistency and visual appeal.
• Collaboration with development teams. Working closely with developers, marketers, and product managers to implement effective and feasible solutions.
• Usability testing. Evaluating how real users interact with the design, identifying friction points, and suggesting improvements.
• Continuous optimization. Analyzing usage metrics and feedback to adapt the experience to changing user and market needs.

The UX/UI designer is a key figure who connects the company’s strategic vision with user expectations, ensuring that every digital interaction is simple, efficient, and memorable.

Uses of UX and UI design in digital projects

UX/UI design is everywhere. From online banking apps to the music streaming platforms we use daily, it plays a key role in many digital projects.

• E-commerce, focusing on improving the shopping experience to reduce cart abandonment.
• Mobile applications, creating simple and engaging flows that encourage users to return.
• Educational platforms, ensuring students can easily find resources in a clear and intuitive way.
• SaaS and corporate tools, interfaces that improve productivity and efficiency.
• Digital marketing, where strong UX strengthens brand identity and improves perception at every touchpoint.

Both UX and UI are not a luxury, but a necessity for any business that wants to stand out in today’s market.

Studying UX and UI: education and career opportunities

Digitalization is advancing at a rapid pace, and with it, the demand for professionals specialized in digital experience design is growing. Choosing training in UX and UI opens the door to one of the most promising fields in the tech industry.

There are many career opportunities for UX/UI experts. Here are the main ones:

• Web designer, focused on creating attractive and functional interfaces.
• UX Researcher, responsible for analyzing user behavior and identifying improvement opportunities.
• UI Designer, specialized in the visual and interactive side of digital products.
• Interface consultant, advising companies on how to optimize user experience.
• Product designer, with a holistic view of digital product design and development.
• Head of user experience, leading teams and strategies in large companies or startups.

But why pursue postgraduate studies in this area? One key reason is the combination of technical knowledge and strategic vision. This is precisely what the Master in Digital Marketing & Growth Hacking provides. Training in UX/UI incorporates product optimization methodologies, behavioral analytics, and growth techniques that help students stand out in recruitment processes.

It is also important for these professionals to have strong English skills and to continuously update their knowledge.

Regarding salaries, UX/UI compensation is very competitive compared to other digital roles. In Spain, junior professionals typically start around €25,000 per year, while senior or internationally experienced profiles can exceed €45,000 and reach €60,000 in leadership positions.

In markets such as the United States or the United Kingdom, these figures are significantly higher, reinforcing the idea that this is a career with strong professional and financial growth potential.