Stabilizers are things that make something steady or not move around too much, like the wheels on a bike.
Stabilizers are usually good because they help keep things safe and balanced.
Examples:
The training wheels on my bike are stabilizers.
Planes have stabilizers to help them fly straight.
The ship's stabilizers keep it from rocking too much in the waves.
The stabilizers on the table legs keep it from wobbling.
The stabilizers on the rocket keep it from tipping over.
The stabilizers on the chair make it safe for me to sit.