Materiality is a cornerstone concept across various disciplines, from accounting and law to philosophy and art. Its meaning adapts based on context, yet it consistently refers to the importance, relevance, or substantiality of information, objects, or considerations within a given field. Understanding materiality enables professionals and students alike to distinguish what matters most in the decision-making process. This page delves into the essence of materiality in English, exploring its definitions, historical evolution, application in key sectors, and the challenges that arise with interpretation.