1. Basic Attention Token (BAT) is a decentralized and open source blockchain-based digital advertising platform built on Ethereum.
2. In the ecosystem, advertisers will give publishers BATs based on the measured attention of users, and users will also receive BATs for participating, which can donate them back to publishers or use them on the platform. This transparent system keeps user data private while delivering fewer but more relevant ads as well as decrease middleman and frauders of users, publishers and advertisers.