A take-profit order is the mirror image of a stop loss. You set a target price, and when the market touches it, the broker closes your position. Take profits help you exit winners systematically instead of second-guessing — a much bigger problem than cutting losers for most retail traders.
A common pattern is to set take profits using a risk-reward ratio — for example, aim for a 2R target (twice the distance from entry to stop). Combined with a fixed 1% risk per trade, this lets you build a strategy around win rate and expectancy rather than individual trade outcomes.