  As evident from the nearby examples of Proxima Centauri and TRAPPIST-1,
Earth-sized planets in the habitable zone of low-mass stars are common. Here,
we focus on such planetary systems and argue that their (oceanic) tides could
be more prominent due to stronger tidal forces. We identify the conditions
under which tides may exert a significant positive influence on biotic
processes including abiogenesis, biological rhythms, nutrient upwelling and
stimulating photosynthesis. We conclude our analysis with the identification of
large-scale algal blooms as potential temporal biosignatures in reflectance
light curves that can arise indirectly as a consequence of strong tidal forces.
