The UI/UX Design Specialization brings a design-centric approach to user interface and user experience design, and offers practical, skill-based instruction centered around a visual communications perspective, rather than on one focused on marketing or programming alone.
Figma is an interface design application that runs in the browser—but it’s actually much more than that. I would go so far as to say it’s probably the best application for team-based collaborative design projects. Figma gives you all the tools you need for the design phase of the project, including vector tools which are capable of fully-fledged illustration, as well as prototyping capabilities, and code generation for hand-off.
It simply refers to sketching out the basics of a user interface before getting into wireframing, prototyping and coding. UI sketching comes right after you’ve had that a great website idea, and before building screen mockups in a website wireframing tool.