The North Atlantic Drift is a very powerful ocean current located in the North Atlantic Ocean. It is an extension of the Gulf Current. This current is warm, and as it moves towards the northeast, alongside the western coastline of Europe, it brings in much warmer and wetter climate. It makes the climate int he coastal regions much more stable, mild if you will, with pleasant summers, and mild winters, with high amounts of precipitation throughout the year.
If we compare it to other currents on the same latitudes, like the California Current, it is much different. The California Current is moving from the North Pacific, southwards alongside the western coats of North America. It is a clod current, and brings in colder and dryer weather in the parts that it affects.