Magnetic flux is really important for understanding Faraday's Law, which has to do with electromagnetism. Let’s break it down:

1. What is Magnetic Flux?
   Magnetic flux (we write it as Φ_B) tells us how much magnetic field (we call it B) goes through a certain area (we call that A). We can find it using this formula:
   $\Phi_B = B \cdot A \cdot \cos(\theta)$
   Here, θ is the angle between the magnetic field lines and a line that is perpendicular to the surface.

2. What is Faraday's Law?
   Faraday's Law says that the electric force (or emf) created in a closed circuit is related to how quickly the magnetic flux changes in that circuit. We can write it like this:
   $\mathcal{E} = -\frac{d\Phi_B}{dt}$

To sum it up, when there are changes in magnetic flux, it creates electric currents. This shows just how connected these ideas are in electromagnetism!