Studies of maser emission with high angular resolution are one of the best tool for deriving kinematics and the physical conditions of regions that are hidden in the dense environments and are not reachable at other wavelength ranges. Therefore, the European VLBI Network as well as other VLBI networks, are successfully used to investigate high-mass star forming regions and evolved stars. With the milliarcsecond
resolution and sensitivity of a few mJy it provides valuable information concerning proper motions and magnetic field. This is a summary of the recent observational progress on masers at the cm
wavelengths and their input on the stellar evolution. Please note, a few important maser studies are presented with great details in this volume. They are not included or only shortly mentioned in my summary.