Quiet Sun and its dynamics as viewed from the ground and from space

Over the past years, state-of-the-art ground-based and/or space-based observations (filtergram, spectroscopic and spectropolarimetric), at a wide range of wavelengths, reveal that the quiet-Sun, just like active regions, is a highly inhomogeneous and dynamic environment that plays an important role in the global dynamics of the entire solar atmosphere. This dynamic quiet-Sun is manifested through a number of different types of features and phenomena that occur in a large range of spatial and temporal scales and are nowadays believed to be mostly driven by the local magnetic field and its dynamics. Ground-based observations processed with state-of-the-art, post-processing reconstruction techniques, often combined with simultaneous space-based observations from a variety of instruments on different spacecraft, offer a unique opportunity to investigate and understand the physical conditions of the local plasma, the nature, formation mechanisms and evolution of quiet-Sun phenomena and possible interrelationships between quiet-Sun phenomena occurring at different heights of the quiet-Sun solar atmosphere, from the photosphere and chromosphere to the transition region and low corona. We provide a comprehensive review of our latest understanding of quiet-Sun and its dynamics as viewed from the ground and from space and discuss the advantages/disadvantages of ground- and space-based observations and future advents in solar observations with new solar instruments.