Pekic/Getty Images This story is available exclusively to Insider subscribers. Become an Insider and start reading now. Recruiters are routinely looking up keywords using "and," or," or "not" in their searches to track down prospective job candidates on LinkedIn. This is known as boolean logic. Three recruiters shared with Business Insider how job seekers can optimize their profiles for the boolean methodology. They suggested including keywords on your profile and resume that are relevant to your experience and roles you're interested in. If you're stuck on finding the right words, select three to five words from job descriptions and brainstorm different ways recruiters might search for specific titles.