**Quantum entanglement: properties and evolution**

Entanglement is a key ingredient in a quantum computer, allowing for quantum
algorithms that perform exponentially faster than any classical counterpart, such
as factoring large numbers. In this talk I will gently introduce the concept of entanglement as a notion of quantum correlations and discuss some of its properties. I will then show how to explicitly quantify the ``decay" of entanglement due
external noise during a physical process (aka decoherence). The talk is intended
to be self-contained and no prior exposure to quantum mechanics is required.