A data bundle is a package of mobile data provided by a mobile network operator or service provider for a specified price. Data bundles are typically sold in various sizes and can be used on an eSIM for accessing internet based services.
When you purchase a data bundle you will receive a set amount of data that can be used within a specified period. Once the data is used up or the expiry period has complete you can purchase another bundle.
With an eSIM the process of purchasing and activating a data bundle is typically done online. This means you can purchase and activate a data bundle directly on your device without needing to visit a retail store or wait for a physical SIM card to arrive in the post.