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This review has discussed the excitation of ionospheric convection by solar wind‐magnetosphere coupling, and the role of magnetospheric currents in magnetosphere‐ionosphere coupling. We have focused on large‐scale dynamics, in an attempt to provide a holistic view of the coupled system. Further details can be found in the reviews cited in the introduction. There are features and processes that have not been covered in this review, but which are discussed in other chapters of this monograph. The energy input to the high‐latitude ionosphere through the electrodynamics discussed here is described in Chapter 1; large‐ and small‐scale polar cap and midlatitude dynamics during substorms and geomagnetic storms are covered in Chapters 3, 7, and 15; the ionospheric plasma structure produced by convection is the topic of Chapter 4. In addition, processes described in this review, including ionospheric heating, can produce significant outflow of ions from the ionosphere into the magnetosphere, with implications for subsequent magnetospheric dynamics, as discussed in Chapter 5. Another feature that has been neglected in this review is the formation of rapid westward convection flows in the duskside subauroral ionosphere, known as subauroral polarization streams (SAPS) and associated with the inner magnetosphere plasma dynamics; this is covered in detail in Chapter 6. Finally, we have not discussed the role of interhemispheric asymmetries associated with dipole tilt, seasonal variations in ionospheric illumination, and the influence of the B_X component of the IMF, and these are described in Chapter 8.