This presentation explores how continuous monitoring of physiological parameters such as inner body temperature, rumination and activity can support dairy herd health management. Practical examples demonstrate the potential of smaXtec data for the early detection of calving, mastitis, hypocalcaemia and ketosis, as well as for identifying herd-level challenges related to feeding, water supply and management. The presentation highlights how digital monitoring can support timely veterinary intervention, informed decision-making and targeted improvements on dairy farms.