Basic Attention Token (BAT) is the cryptocurrency that fuels an innovative blockchain-based digital advertising platform, aiming to fairly compensate users for their attention while providing advertisers with improved returns on their advertising investments. This platform is integrated into the Brave Browser, offering users the opportunity to view privacy-preserving advertisements and earn BAT rewards in return. Conversely, advertisers can target their ads effectively to enhance engagement and mitigate losses from ad fraud and misuse. BAT serves as the primary reward unit within this advertising ecosystem, facilitating transactions between advertisers, publishers, and users. Advertisers utilize BAT tokens to fund their advertising campaigns, with a portion allocated to publishers and the majority (70%) distributed to users. By eliminating intermediaries that typically inflate advertising costs, the platform enhances cost-efficiency. Launched in 2017, Basic Attention Token experienced one of the fastest initial coin offering (ICO) sell-outs, raising $35 million in less than a minute. Since then, it has expanded its attention-based advertising experience to users across numerous countries through the Brave Rewards program, with the United States, the United Kingdom, and Canada boasting the most active advertising campaigns as of November 2020.