Discover has more training you can choose to take, on top of what your workplace asks you to do.
Steps
Open Discover. It's the magnifying glass in the bar at the bottom.
Search or scroll. Type what you'd like to learn in the search box, or browse the list. Each item shows how long it takes and its level, such as Beginner.
Open the training and work through it, then select Complete.
Pro tip: Finish your required training first. Discover is for building your skills once that's done.