Serra Search is an AI-driven recruitment search engine that integrates with your ATS (Applicant Tracking System) and sources such as GitHub and LinkedIn, helping you quickly find and rank candidates based on specific criteria and predicted job performance. The product employs GPT technology to showcase the best matches for criteria like 'Product Manager with SaaS experience and UX design skills.' It also offers features such as candidate screening, skill searches, candidate match assessments, fraud application checks, and diversity metrics to help achieve diversity and inclusion goals.