This session welcomes abstracts that highlight the latest advancements in understanding of the E-region dynamics, and open questions related to sporadic E-layer forecast, lower E-layer formation mechanism, as well as novel applications. Papers related to theory, observations, experiments, modeling, E-region data assimilation and neutral density forecasting, and other applications are all encouraged. The session also aims to hear about observations of neutral winds and neutral densities that could further help to investigate various E-region phenomena.