VWAP weights each traded price by volume, so it reflects where more activity occurred instead of treating every price equally.
The calculation resets according to its anchor: session VWAP, anchored VWAP, and rolling VWAP answer different questions. A VWAP label without its anchor is incomplete.
Price above or below VWAP is descriptive context. It is not a rule that price must return or that a cross guarantees continuation.