An informational interview is not a job interview. Rather, it's an interview with an individual working in a career you would like to learn more about.
When you're interviewing for information, you are seeking information about a specific type of job, about a career field, an industry, and/or a company. You're attempting to discover what the person's job is like, what they do, what responsibilities they have, and what it's like to work in their job at their company.
Informational Interview Resources