WTF is OSINT?!

OSINT is an acronym for Open-Source Intelligence, and describes the practice of collecting, analysing, and processing publicly available information on an individual, company or organisation.

As per Wikipedia's definition:

Open-source intelligence (OSINT) is the collection and analysis of data gathered from open sources (covert sources and publicly available information [PAI]) to produce actionable intelligence. OSINT is primarily used in national security, law enforcement, and business intelligence functions and is of value to analysts who use non-sensitive intelligence in answering classified, unclassified, or proprietary intelligence requirements across the previous intelligence disciplines.[1]