It's important to clarify that plate tectonics doesn't have a "purpose" in the sense of a conscious goal. It's a complex geological process driven by the Earth's internal heat and energy. However, the movements of these plates have profound effects on our planet, shaping its surface and influencing life as we know it.

Here are some of the key consequences of plate tectonics:

* Formation of continents and oceans: Plate movement causes continents to collide, forming mountain ranges, and to separate, creating oceans and rift valleys.

* Volcanism and earthquakes: The interaction of plates at boundaries leads to the formation of volcanoes and triggers earthquakes. This activity can be both destructive and beneficial, contributing to soil fertility and creating geothermal energy resources.

* Distribution of resources: Plate tectonics influences the distribution of mineral resources, oil and gas deposits, and fertile land.

* Climate regulation: Volcanic eruptions release gases into the atmosphere that can affect global climate.

* Evolution of life: Plate movement has played a role in the evolution of life by isolating species and creating new environments.

In summary, while plate tectonics doesn't have a purpose in the traditional sense, its movements are responsible for shaping our planet's surface, influencing the distribution of resources, and contributing to the evolution of life on Earth.