Someone said that “A capacitor can store charges” is technically wrong. What does he mean?

Question

Please help me understand and find reasoning as to what does he really mean. Hoping someone will help me. Thank you

Answer 1

The technical point here is that the net charge on a capacitor is always zero regardless if it has been charged or not. An uncharged capacitor has, of course, no charge at all. A charged capacitor has negative charge at one end and an equal amount of positive charge at the other end - thus a net charge of zero.

When it is said that a capacitor has a charge of Q, what is meant is that one end has a charge of Q and the other end has a charge of -Q.