In Magento 2, certain pages are designed as uncacheable, as known as non-cacheable, by marking a block on the layout with cacheable="false". This action disables the full page cache for those pages. The following pages on the storefront are uncachable:
- Customer Account pages: pages related to the customer account such as login, create a new account, forgot password, order history, downloadable products, wishlist, address, and my product reviews, etc.
- Shopping Cart page
- Checkout page
- Products Comparison List page
- Contact page
- Popular Search Terms page
I recommend checking the Popular Search Terms page as it is the most lightweight.