A Take Profit order is an order to close a trade when the market moves a specified amount in favor of the position. It is mandatory on every position with the exception of cryptocurrencies and real assets.
Take Profit helps you to ensure the profit in case the market moves the way you expected.
You can adjust your take profit rate according to the position rate or to a specific amount.
The position will then be closed in case of reached rate/amount. The maximum Take Profit for manual positions is 1000% of your invested amount +/- current P&L. This means that you will be able to update your Take Profit level continually as your profits increase.
See also - what is Stop loss