User-friendliness is often used as a term to describe a product or design that is easy to use and navigate without the need for extensive instructions or training. Other words that can be used as synonyms for user-friendliness include accessibility, simplicity, intuitiveness, ease-of-use, and navigability. These words all point to the same attribute of a product and emphasize that the user experience is paramount. A product that is user-friendly is likely to be more successful than one that is not, as users are more likely to engage with a product that is easy to understand and use.