Cerebral blood flow is the physiological process by which blood is delivered to the brain, ensuring the supply of oxygen and nutrients necessary for metabolic activity and neuronal function. As an academic concept and research field, it encompasses the study of the volume, velocity, and dynamic regulation of this vital circulation within the cerebral vasculature, investigating its critical role in maintaining brain homeostasis, its alterations in pathological conditions, and its measurement through various imaging and monitoring techniques. Its significance lies in its fundamental importance for understanding brain health and disease, serving as a key biomarker for neurological disorders, and guiding therapeutic strategies.