Digital reference services utilize web technologies to provide reference services in a digital environment. They aim to satisfy users' information needs interactively and collaboratively. Key characteristics of digital reference services include accessibility, prompt responses, clear policies, interactivity, and instruction. Services must also have authoritative and trained experts, ensure privacy, conduct reviews, and provide access to related information and publicity. Digital reference services offer benefits like individual assistance, collection development support, and marketing assistance. They require planning, training, testing, promotion and evaluation for successful implementation.