What is the main difference between lava and magma?

Place of formation

Lava and magma, although closely related, differ in their location in the volcanic process. Magma, a molten rock, resides beneath the Earth's surface, in magma chambers where it forms and accumulates. When the pressure becomes too great, magma bursts forth to the surface, becoming lava. This transition from magma to lava marks the spectacular moment when the Earth's innards are revealed to the outside world, transforming the landscape and creating new terrains. As lava cools, it contributes to the growth of volcanic islands and the formation of new lands, illustrating the perpetual cycle of destruction and creation that characterizes our planet.