Electricity is a phenomenon. It is the electrons that travel which is referred as charge and this flow of constant charge in a particular period of time is referred to as current. Basic cconditions for current to flow are (1)-there should be a potential difference. (2)- the circuit should be closed.
Note:- current is a flow of matter, so it always travels through wire where electrical energy travels through space but not wire.
If you want to know how do you get electricty to your home, the answer is actually very very long but I will make it very basic.
First it is generated at the generating side using various sources and then it is transmitted through current lines and then it is distributed to out houses. There are two types of current, AC & DC.