Medline Plus is a free online health information resource created by the National Library of Medicine for patients and their families. It provides easy-to-understand information on diseases, conditions, and wellness issues sourced from trusted organizations like the CDC and NIH. Users can search for basic information on health topics through ready reference questions, tutorials, or videos. As a patient education tool from the NLM, Medline Plus information is trustworthy and accessible without requiring a medical background.