Choreography is a classical ballet term assigned to the actual steps, patterns and grouping of steps that make up a ballet or dance. While it is used in classical ballet, the term choreography is used to describe steps in a dance for every single form of dance. Choreography can describe anything from the first ballet created hundreds of years ago, a tap solo seen last year, or a few steps created today in your living room.
When someone says “That choreography looks hard!”, it is very similar to saying “That dance looks hard!” But, someone usually wouldn’t say “I struggled picking up some of the dance.” but rather, “I struggled picking up some of the choreography.” instead.