This means that one cannot send information faster than light.
What is useful however is the fact that when you send entangled qubits very far away, and measure them is the fact that the results of the measurements are always correlated/anti-correlated.
As an example.
Alice has a pair of entangled qubits, they are in a superposition of 1 and 0 (lets say they are an correlated pair, such that when measured both quibits will always agree).
She sends one to Bob.
Bob and Alice now hold one qubit each out of the entangled pair. They both measure their qubits. The measurement is probabilistic, you have a 50/50 chance of getting a 1 or a 0, but Bobs quibits and Alices quibit will agree everytime.
Since you can't control the outcome of the experiment you cannot decide which bit to send and hence cannot send information.
The useful result is that Alice and Bob have a string of bits which only the two of them know the arrangement of. They can use the string of bits as a one-time pad for encryption.
I have simplified this immensely but I think the point gets across.
Source : I currently undertake research into generating qubits for quantum computation and communication purposes.