What is metaphysics (in philosophy) in plain language?

Metaphysics, in philosophy, is the branch of philosophy that deals with the nature of reality. It is the study of the fundamental questions of existence, such as: What is the nature of reality? What is the nature of space and time? What is the nature of the mind? What is the nature of knowledge? What is the nature of being?

Metaphysics is the study of the fundamental nature of reality, and how it relates to our experience of the world. It is not concerned with the physical world, or with the laws of nature, but rather with the underlying structure of the world and how it relates to our experience. Metaphysics asks questions about the nature of existence, such as: How do we know what is real? What is the nature of cause and effect? What is the nature of the self?

Metaphysics is a difficult field of study, as it is concerned with questions that are often difficult to answer. It is not an exact science, and so there are many different theories and perspectives on the nature of reality. However, it is an important area of philosophy, as it helps us to understand the fundamental nature of reality, and to better understand our experience of the world.