BAT is the cryptocurrency token used to reward viewers and publishers using the Brave Browser.

'Brave' is a new style of browser that protects a user's privacy by blocking ad trackers and malware. By removing ads in this way, while offering a simple interface and different search engine options, the Brave browser provides a faster, safer (and more rewarding) way to browse the internet.

In brief: faster load times while keeping your browsing history all your own.

The BAT or Basic Attention Token is a cryptocurrency that runs on the Ethereum blockchain and is the native token of the Brave Browser ecosystem. 

Advertisers use it to pay rewards to users for viewing ads and to publishers for creating quality content that attracts attention, measured in dwell time.