Deepfakes are AI-generated media that realistically mimic people, making it difficult to distinguish real from fake content. They pose serious threats like fraud, misinformation, identity theft, and harassment. Deepfake detection technology uses AI to analyze visual, audio, and behavioral inconsistencies, metadata, and biological signals to identify manipulated content. Tools like Intel FakeCatcher and Sensity AI help detect such media in real time. Despite challenges like evolving deepfake methods and high computational demands, detection systems remain crucial. The future lies in combining AI, digital forensics, and authentication methods to ensure content credibility and combat digital deception effectively.