The unit that describes the strength of a magnetic field is the Tesla (T).

Here's why:

* Tesla is the standard unit in the International System of Units (SI).

* It represents the strength of a magnetic field that exerts a force of one newton on a one-ampere current flowing through a wire one meter long.

* Gauss (G) is another unit for magnetic field strength, but it's part of the CGS (centimeter-gram-second) system. One Tesla is equal to 10,000 Gauss.

So, when you see a magnetic field strength measured in Teslas, you know it's a measure of how strong the field is.