Rocky and bluffed coasts include soft glacial outwash bluffs of Puget Sound and the U.S. Great Lakes, permafrost bluffs ringing the Arctic Ocean, elevated marine terraces formed by tectonic uplift, such as central California, Papua New Guinea, and Barbados, and hard rock coasts characterized by shore platforms that are common worldwide. Coastal cliffs change in response to some combination of marine and terrestrial forcing across multiple space-time scales. There is growing need for increased knowledge of processes driving change along rocky and bluffed coasts and predictive models for investigating potential response to various climate change scenarios. The 2021 Coastal Cliff and Bluff session welcomes contributions from field observations, modelling, emerging monitoring techniques, physical experiments, and interdisciplinary research linking coastal cliffs and bluffs morphodynamics with oceanography, geology, biology, ecology, and social science. Contributions are encouraged from a wide range of studies including rocky coasts, weakly or unconsolidated cliffs/bluffs, and shore platforms.