What is a stop-loss and why is it important?  

A stop-loss is a trading tool designed to minimize losses in financial markets. It automatically closes a position when an asset's price reaches a predetermined level.  

Why use a stop-loss?  
1. Risk control: Helps avoid significant financial losses.  
2. Emotional discipline: Prevents impulsive decisions during market volatility.  
3. Automation: Reduces the need for constant market monitoring.  

This tool is crucial for maintaining financial stability and effective capital management for both new and experienced traders.