The efficient utilization of computation and communication resources became a critical design issue in a wide range of net-worked systems due to the finite computation and processing capabilities of system components (e.g.,sensor,controller) and shared net-work bandwidth.Event-triggered mechanisms (ETMs) are regarded as a major paradigm shift in resource-constrained applications com-pared to the classical time-triggered mechanisms,which allows a trade-off to be achieved between desired control/estimation perform-ance and improved resource efficiency.In recent years,dynamic event-triggered mechanisms (DETMs) are emerging as a promising ena-bler to fulfill more resource-efficient and flexible design requirements.This paper provides a comprehensive review of the latest develop-ments in dynamic event-triggered control and estimation for networked systems.Firstly,a unified event-triggered control and estima-tion framework is established,which empowers several fundamental issues associated with the construction and implementation of the desired ETM and controller/estimator to be systematically investigated.Secondly,the motivations of DETMs and their main features and benefits are outlined.Then,two typical classes of DETMs based on auxiliary dynamic variables (ADVs) and dynamic threshold parameters (DTPs) are elaborated.In addition,the main techniques of constructing ADVs and DTPs are classified,and their corres-ponding analysis and design methods are discussed.Furthermore,three application examples are provided to evaluate different ETMs and verify how and under what conditions DETMs are superior to their static and periodic counterparts.Finally,several challenging is-sues are envisioned to direct the future research.