A 1 A (ampere) current means that 1 coulomb of electric charge is flowing through a conductor every second. In simple terms, an ampere is a unit used to measure the flow of electrical charge.
If you imagine electricity like water flowing through a pipe, the ampere measures how much "charge" is flowing through the wire, similar to how we measure the amount of water flowing in a pipe.
So, when you say a 1 A current, it means that for every second, 1 coulomb (a unit of electric charge) passes through a point in the wire. This is a basic unit of electric current used to understand how much electricity is flowing in a circuit.