Discoverability in design refers to the users’ ability to find key information, services, or applications. The quality allows users to locate something they need in order to complete a certain task. It is often referred to what is noticeable to users on a particular web page and can be a challenge in design because it can be difficult to prioritize, as not everything can be equally visible.
Discoverability can be achieved in a number of ways. These include changing the size, order, design elements (like color, font, shadow etc.), flow, and consistency of elements on a webpage.