Proactive caching is essential in Magento 2 because it ensures that frequently accessed pages are generated and stored in the cache before customers visit them. Without proactive caching, the first visitor may experience slower page load times while the cache is being created. Magento 2 Cache Warmer automatically preloads product, category, CMS, and other important pages, making them readily available to users.  Website URL: https://store.webkul.com/magento2-cache-warmer.html