What price action is
Price action is the practice of reading a market from price itself: where it traded, where it was refused, how quickly it moved away, and what it did when it returned. The chart is treated as a record of decisions rather than as a dataset to be transformed.
This does not make indicators useless. It makes them secondary. A moving average is a summary of price that arrives after the fact; the price that produced it arrived first. Price action asks what the underlying record says before asking what a derivative of it says.
The distinction that matters
An indicator tells you where price is relative to its own recent history. Price action asks what happened at the moments that mattered — and in what order.