Typography in mobile app design has shifted significantly in the last few few years. Where before, designers were searching for unique fonts to differentiate their designs, many now opt for the iOS and Android defaults, San Francisco and Roboto respectively.
Depending on where or how you work, it may not be all that often you get roped into high-level marketing discussions with your team or client base. Even so, there may come a time when a marketing term passes your way that you're not familiar with.
In the past, many business owners thought that having a fancy website was all you had to do. However, with the sprouting of websites here and there, having a website to promote the business that you offer is just not enough.