Due to low luminosity, a red dwarf’s habitable zone is much closer than that of the Sun, often within 0.1–0.4 AU.
This proximity affects tidal locking and radiation exposure for planets.
It also informs telescope targeting for detecting Earth-sized exoplanets.
Planets can orbit red dwarfs at blistering speeds and still be in the habitable zone.
[ESA, esa.int]