Developmental delay refers to a condition where a child does not reach expected milestones in areas such as speech, motor skills, social skills, or cognitive abilities within the typical age range. This can affect a child's ability to learn, communicate, and interact with others, potentially leading to challenges in school and daily life. Causes of developmental delay can vary and may include genetic factors, environmental influences, or complications during pregnancy and birth. Early intervention through therapies and support can help children with developmental delays improve their skills and reach their full potential.