In a way that is clearly noticeable or stands out, or in an important or featured position.
From Latin 'prominentia' (jutting out), from 'prominere' (pro- forward + minere to jut). The -ly adverb suffix converts the adjective 'prominent' to show how something is done. The root meaning of physical projection shaped the metaphorical meaning.
The Latin root literally means 'sticking out forward'—so something prominent is something that literally juts toward you. In advertising and design, 'prominently displayed' means it literally protrudes into your visual field, commanding attention.
Complete word intelligence in one call. Free tier — 50 lookups/day.