This is when a site or app is instinctive to use. It can be measured by how easy a site is to use for first time visitors. There are some “learnable” aspects of web design that have become ingrained in how we use the web. For example most people know by clicking the logo on a website header takes the user back to the home-page. When a designer or company is launching a website that is more complicated than what is normally expected from the user, a walk-through, click-through or guide to teach the user how to use the functions. A website that is fully “learnable” should score high on user satisfaction and return a low number of errors.
Good Example of Learnability
Google Search and their other web applications (calendar, drive, docs, fonts) are the definition of good learnability. This is largely due to the time they invested in creating “Material Design”. Users that are less familiar with computers simply have to learn how to use one application (with the use of Google’s helpful prompts). After learning this initial app, the skills are transferable to the others.
Bad Example of Learnability
Contrary to the aesthetics of this site, its actually really interesting. Physicsgirl.com is a blog run by Sabrina Gonzalez Pasterski who is set to be the next Einstein. Her website however is confusing. The lack of a navigation bar makes it difficult to learn the relationship between the pages. On the home page, the placement of the links in the articles are inconsistent.