The 'Cart Abandonment Rate' in e-commerce analytics refers to the percentage of shopping carts that are filled but never lead to a completed purchase. It is an important metric as it indicates potential issues in the checkout process or customer hesitation.

Understanding and reducing the cart abandonment rate is crucial for increasing sales. Factors such as complicated checkout processes, unexpected costs, or lack of trust can contribute to high abandonment rates. Addressing these issues can significantly improve the customer experience and conversion rates.

By analyzing the reasons behind cart abandonment and implementing strategies to reduce it, e-commerce businesses can recover potentially lost revenue and improve the overall effectiveness of their online store. A lower cart abandonment rate often leads to higher conversion rates and increased revenue.