"Glacial drift" is a broad term that encompasses all the materials transported and deposited by glaciers. It's not an action in itself, but rather the result of glacial movement. Here's what it does:

1. Transportation:

* Glaciers act like giant bulldozers, scraping and eroding the land as they move. This process breaks down rocks and soil, which are then carried along by the ice.

* The size of the material transported can vary greatly, from fine silt to massive boulders.

* The direction of the glacial movement influences the direction of material transport.

2. Deposition:

* As glaciers melt, they release their load of transported material. This material is deposited in various forms, creating distinct landforms.

* Till: Unsorted, unstratified material directly deposited by the glacier.

* Outwash: Sorted and stratified material deposited by meltwater streams flowing from the glacier.

* Erratics: Large boulders transported and deposited far from their original source.

* Moraines: Ridges of till deposited at the edge of the glacier or where it retreated.

Overall, glacial drift plays a significant role in shaping the landscape:

* Eroding mountains and valleys: Glaciers carve out valleys, leaving behind U-shaped valleys and fjords.

* Creating plains and hills: The deposition of till and outwash creates plains, hills, and drumlins.

* Leaving behind unique features: Erratics, moraines, and other glacial landforms provide evidence of past glaciation.

So, instead of "doing" something, glacial drift is the result of glacial action and the process by which glaciers modify the landscape.