Boolean search is a way of constructing precise search queries using logical operators — primarily AND, OR, and NOT — along with quotation marks and parentheses. For example, `("Go" OR "Golang") AND "Kubernetes" NOT "intern"` finds candidates matching specific combinations of terms.
Recruiters rely on Boolean search constantly: to filter resumes inside an Applicant Tracking System and to find candidates on platforms like LinkedIn. This is exactly why keyword alignment matters so much for inbound applications — if your resume doesn't contain the terms a recruiter searches for, you won't appear in their results, regardless of your actual fit.
Understanding Boolean search also helps you on the other side: you can use the same operators to find decision-makers, company information, and contact details when doing your own outreach research.