Casual speech refers to informal communication that occurs in everyday conversations. It often includes slang, colloquialisms, and relaxed grammar, making it more relatable and friendly. People use casual speech when talking with friends, family, or in relaxed settings, allowing for a more personal connection. This type of speech can vary by region and culture, reflecting local dialects and expressions. For example, phrases like "What's up?" or "Gonna" are common in casual speech. While it may lack the formality of professional or academic language, casual speech plays a vital role in social interactions and building relationships.