Why do electric cars need regenerative braking?

I've noticed that many electric cars have a feature called regenerative braking. How does this work and why is it necessary for electric vehicles?

Regenerative braking is a clever technology that allows electric cars to recharge their batteries while braking. This is important because electric cars rely on their batteries for power and need to be recharged frequently.

Regenerative braking recovers kinetic energy that is usually lost during traditional braking methods. This energy is then stored in the car's battery, increasing its overall efficiency and range.