Definition
Sourcing covers every action taken to identify candidates before they apply. You search your own database (the dormant talent pool is often the best source), LinkedIn, specialized sites, professional communities or referrals, then approach the selected profiles with a personalized message.
The core technique is Boolean search, which combines keywords, synonyms and exclusions.
Why it matters
For rare profiles, waiting for applications is not enough. Sourcing widens the pool and reaches employed people who are not looking at job ads. It requires discipline: a message that explains the role and why you are contacting this person, and an answer even when the process stops. For concrete strategies in tech, see our guide to recruiting developers.
Concrete example
For a practical nurse role in a smaller town, an agency first searches its own database, then LinkedIn with a Boolean string in English and French, then asks past candidates who might refer someone. Each approach names the role, the location and the reason for contacting the person. Every person contacted gets an answer, including when the role is filled.