What is a defining characteristic of real estate according to the text?

Real estate is fundamentally defined by its inclusion of land and any permanent structures that are affixed to that land. This characteristic sets real estate apart from other types of property, such as personal property, which can be easily moved and does not include land. The permanence of land and the structures built upon it creates unique considerations in real estate transactions, such as zoning laws, property taxes, and investment potential. Recognizing that real estate consists of tangible, immovable assets is essential for understanding the nature of property rights, valuation, and the implications of ownership.