A maker order rests on an order book and adds available liquidity. A taker order matches immediately against an existing order and removes liquidity.
Order type is not the whole answer
Market orders are normally takers. A limit order can still be a taker if its price crosses the current book and executes immediately.
Fee schedules differ by exchange, market, and recent volume. Check the current preview and rules rather than assuming one rate.
The classification depends on execution
An order is a maker when it rests on the book and adds liquidity. It is a taker when it immediately matches existing orders and removes liquidity.
The fee schedule can depend on more than order type
Trading volume, account tier, pair, promotion, and platform rules may change the rate. Check the current schedule and the final order preview.
Sources
Educational information, not investment advice.