Fully submersible: both the motor and pump end are submerged in the water.
Designed to push water out (rather than pulling): the pump is placed below the water level.
Used for wells, boreholes, water supply, domestic water, irrigation, etc., depending on power and size.
Typical construction / features include:
Stainless steel shell and discharge parts in many models (especially Myers Ranger Series) to resist corrosion.