Hey! I'm Nate, one of the founders of Lever and our CTO. Sourcing is a word that companies and recruiters use to mean going out and finding candidates that aren't looking for a job (passive), but that have a really high relevance to what the company is looking for.

As hiring has gotten increasingly competitive, companies have been finding that the best candidates usually come from a personal connection. The best candidates usually come via a referral from someone's personal network or via sourcing efforts, where the company goes out and finds people that are a really strong fit based on their interests and experience.

Lever has a number of features that specifically make sourcing easier: https://lever.co/features.html. The best is our Chrome Extension for easily creating candidates in Lever from a web profile. We also have really great 2-way email sync that uses IMAP to sync Gmail threads in realtime, so that your company can follow along on what is happening with candidates and make sure that you don't drop the ball.