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According to the existing forms of rare earth elements, we classify rare earth promoted transition metal sulfides into rare earth doped transition metal sulfides, rare earth interface promoted transition metal sulfides, and rare earth structure promoted transition metal sulfides. We also prospect their applications in OER, HER, ORR, and CO₂RR, as well as in other electrocatalytic fields. In today's increasingly serious energy problem, it is of great significance to rationally utilize rare earths to promote the regulation of transition metals, enabling them to achieve more efficient and stable energy storage and conversion. More details are given in the article by Xi et al. on page 1740—1752.