A situational comedy, commonly known as a sitcom, is a television or radio genre that centers on a fixed set of characters navigating humorous, often recurring, situations within a consistent, shared environment. The format usually involves 20 to 30-minute episodes that blend comedy with character-driven storytelling, focusing on daily life, relationships, and workplace or home scenarios.

Key Characteristics:
Recurring Characters and Setting: The show revolves around the same group of characters, usually in the same location (e.g., Friends in an apartment, The Office in a workplace).

The "Situation": Humor is derived from awkward, unusual, or everyday scenarios that the characters cannot easily escape.

Structure: Sitcoms often feature a, 22-minute runtime (with commercials filling the remaining 8 minutes) and often use a "status quo" format where problems are resolved by the end of the episode.

Tone: The stories are generally lighthearted and intended to make viewers laugh.

Production Style: Traditionally, they were recorded in front of a live audience or featured a laugh track (multi-camera). Modern, single-camera sitcoms, such as The Office or Modern Family, often use a "mockumentary" style without a laugh track.

Difference from Other Genres:
Unlike sketch comedy, which uses new characters and settings each time, sitcoms maintain character continuity over time, allowing audiences to build an investment in their lives. They also differ from drama by using humor to tackle social issues or personal dilemmas rather than purely emotional, dramatic stakes.