- firstbird is a digital employee referral tool that aims to increase hiring through employee referrals by addressing issues with manual referral programs like lack of transparency, traceability, and motivation. - It works by actively informing employees of open jobs, allowing them to refer candidates and share jobs on social networks, and updating them on the status of their referrals. - This transparency and gamification of the referral process through comparisons and visibility of achievements motivates more referrals and hiring through employees' social networks.