The rotating, oscillating or vibrating heads which are frequently found on electric toothbrushes as they can help in removing plaque more efficiently with hand brushing.

Easy of use

Those with dexterity problems or limited mobility, like those with arthritis, may find brushing easier due to automated movements.

Built in timers

There are lot of toothbrushes which has timers or intervals which helps to make sure that you brushing full two minutes.

Gentle on gums

Some electric toothbrushes comes with pressure sensors that warns users when they brush too firmly, which avoids the damaging of the gums.

Improves gum health

Electric toothbrushes can aid in improving gum health by effectively removing plaque, that lowers the risk of gingivitis and gum disease.

Source: https://www.dnaindia.com/web-stories/lifestyle/benefits-of-using-electric-toothbrush-plaque-removal-build-in-timer-ease-of-use-gentle-gum-stain-removal-gum-health--1703317934884