What does locking rear axle mean?

Locking the rear axle refers to a mechanism in vehicles, particularly in off-road or four-wheel-drive models, that engages both rear wheels to turn at the same speed. This enhances traction on slippery or uneven surfaces by preventing one wheel from spinning faster than the other, which can occur during difficult driving conditions. When activated, it helps improve the vehicle's stability and control, making it easier to navigate through tough terrains.