What does the operator “<<” mean in C#?

Question

I was doing some basic audio programming in C# using the NAudio package and I came across the following expression and I have no idea what it means, as i\'ve never seen the

Answer 1

Shift left (and the counterpart, Shift right) moves the bits in the given direction.

Shift left is more or less times 2, but faster

Shift right is more or less divided by 2, but faster