Yeah, it means that the area has a Background Count of 2, which is aspected toward Electricity. That means that all magic performed in the area suffers the penalties for the Background (-2 dice pool if we're talking 5th edition). But anything related to Electricity not only doesn't suffer that penalty, but gets a bonus instead (+2 limit for 5e).
Conceptually, you could describe it (to the Magic characters) as a feeling like everything is a blur, or motion-sickness whenever they try to perform magic. But if the cast an electricity spell such as Lightning Bolt, everything suddenly comes into focus, and the area seems to spark and charge, drawing out the power being channeled for the spell.
I recommend you don't tell your group about the aspect unless someone does really well on an Assensing test. Just tell them they suffer from a Background of 2. If they happen to cast an electricity spell, then tell them they get a bonus.