Comedy is a skill in The Sims 4. The higher a Sim's Comedy skill, the more successful their jokes will be and the more money they will receive for performing routines. This skill is essential for the Comedian branch of the Entertainercareer.
Comedy skill is mainly built by writing jokes on a computer, reading Comedy skill books and through Funny Interactions with other Sims. As your Sim levels up, the unlocked options to write, refine and perform routines will also build Comedy skill. Sims who are Playful will build Comedy skill faster.