Abstract Apathy has attracted a lot of research interest in the last 10 to 15 years, and physicians who treat populations with neuropsychiatric disorders are beginning to recognize it more and more or more frequently. Apathy is linked to several unpleasant outcomes or negative symptoms, appears to be common in many brain disorders, and may be curable. Apathy is a key component of the negative symptoms of schizophrenia spectrum disorders, and it has a significant impact on how well people function in daily life. (Schizophrenia is a disabling psychiatric disease or a disorder characterized by disturbances in thought, feeling, emotion, and interpersonal and vocational functioning). As a result, optimizing treatment for apathy looks essential to improving results or outcomes. Even though it has therapeutic importance, apathy is generally ignored in treatment and clinical studies; in contrast, adverse outcomes are typically explored as a unifactorial construct. Consequently, our goal is to bring increased attention to the condition of apathy diagnosis and treatment in schizophrenia spectrum disorder. We begin by defining apathy and discussing its prevalence, clinical characteristics, and effects on functioning. Then, we review the diagnostic criteria for apathy in brain disorder, and methods for assessing apathy, including Clinical rating scales, and behavioral measures. Finally, we discuss the available evidence for the treatment of apathy in schizophrenia spectrum disorders, including pharmacological and non-pharmacological interventions or therapies and treatments. The available research data suggests that apathy is a heterogeneous construct that can be caused by a variety of elements, such as neurocognitive deficits, medication side effects, and environmental stressors. As a result, there is no single treatment that is effective for everyone who suffers from apathy. However, there is some data or evidence that suggests cognitive-behavioral therapy, behavioral activation, social skill training, cognitive remediation therapy, early intervention services, and motivational interviewing may be useful in lowering apathy and enhancing functioning. The purpose of the study is to enhance the understanding or awareness of apathy as an important clinical and research issue, which means that everyone should "care" about apathy.