Complex sentence: Goodwill is an accounting concept meaning the value of an asset owned that is intangible but has a quantifiable "prudent value" in a business for example a reputation the firm enjoyed with its clients.
Split into simpler sentences: Goodwill is an accounting concept meaning the value of an asset owned that is intangible but has a quantifiable "prudent value" in a business. For example, a reputation the firm enjoyed with its clients.