The twelve instruments on board the SOHO spacecraft have been observing the Sun, the corona, and the heliosphere from the Sun-Earth Lagrange point, L1, since 1996. Observations cover the entire ascending part of activity cycle 23, from the minimum in 1996 through its maximum in 2000, allowing research of activity-related variations spanning from the deep interior to the heliosphere. The wide range of diagnostic tools offered by the different instruments allow an unprecedented study of the interrelation between different activity mechanisms. Combining observations from different instruments and comparing with theoretical studies, a better understanding of the underlying mechanisms is now possible. This is not only important for the advancement of solar physics, but also a necessary ingredient in the study of the influence of a varying Sun on the Earth's environment and climate. This workshop will present the current knowledge about our varying star, and provide a platform for inter-experiment exchange of scientific results and their interpretation, stimulating cross-fertilization among the different areas of solar physics representing the SOHO experiments.--Publisher's description.