Dementia is a broad term used to describe a decline in cognitive function that affects a person's ability to perform everyday activities. It is not a specific disease, but rather a group of symptoms associated with a variety of neurological conditions, the most common of which is Alzheimer's disease. Symptoms of dementia may include memory loss, confusion, difficulty communicating, and changes in mood or behavior. As the condition progresses, individuals may require increasing levels of care and support. Research in the field of dementia focuses on understanding the underlying causes of the condition, developing effective treatments, and improving quality of life for those affected by dementia. This research is vital as the prevalence of dementia is expected to increase in the coming years due to an aging population.