Frictions are the usability issues of UX.

“In user experience, friction is defined as interactions that inhibit people from intuitively and painlessly achieving their goals within a digital interface. Friction is a major problem because it leads to bouncing, reduces conversions, and frustrates would-be customers to the point of abandoning their tasks. Today, the most successful digital experiences have emerged out of focusing on reducing friction in the user journey (…)”

(Victoria Young a.k.a. @victoriahyoung ~ Betterment) ★