What Is User Experience (UX) Design?

In Simple Words:

The user experience is how a user interacts with and experiences a product, system, or service. It can be anything from physical to digital products that we use in our daily lives.

For example, physical products could be everything from roads, traffic lights, escalators, vehicles, and digital products like websites, enterprise applications, maps, virtual/mixed reality games, and many more.

User experience (UX) is made of all the interactions a user or a person has with a product or service. It is the personal, internal experience customers (people) go through while interacting with any company as a whole. It involves everything from brand advertisement, in-store, online experiences to customer services.

Definitions:

"Person's perceptions and responses resulting from the use and/or anticipated use of a product, system, or service."

By ISO 9241-210:2010(en) Ergonomics of human-system interaction — Part 210: Human-centred design for interactive systems

"The overall experience of a person using a product such as a website or a computer application, especially in terms of how easy or pleasing it is to use. If a website degrades the user experience too much, people will simply stay away"

Definitions from Oxford Languages

"User experience" encompasses all aspects of the end-user's interaction with the company, its services, and its products.

By Don Norman and Jakob Nielsen