Bundlers are participants on the Bitswift blockchain which are processing Bitswift transactions. Bundlers charge a fee to the end user or app to process the transaction. Bundlers will set their rates based on market conditions and they determine the final end user transaction fees which are always denominated in Bitswift tokens (BITS).
Bundling is a great way to harvest digital assets from the Blockchain ecosystem, it requires minimal technical knowledge and no direct investment in proprietary mining hardware.
For more information about the Bitswift bundling process please check the following resources: