What significant effect is likely to occur to a planet orbiting very closely within a low-mass star's Habitable Zone?

Answer

Tidal locking

Due to the strong gravitational forces at closer orbital distances around dim stars, an orbiting planet is likely to become tidally locked, with one side facing perpetual day.

What significant effect is likely to occur to a planet orbiting very closely within a low-mass star's Habitable Zone?

#Videos

Low Mass Stars: Crash Course Astronomy #29 - YouTube

astronomystarsmasslow-mass