This paper provides an in-depth overview of cyber threat intelligence (CTI) and its role in proactive security operations. It explains how raw data is transformed into actionable intelligence using frameworks such as STIX and TAXII. The document outlines the CTI lifecycle, including collection, processing, analysis, and sharing. It highlights the differences between basic threat feeds and enriched intelligence feeds, emphasizing business benefits such as reduced false positives and faster response. The paper also showcases how curated threat intelligence feeds help organizations anticipate attacks and strengthen defensive decision-making.

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