A vector index is a specialized type of index that efficiently manages multidimensional data, or vectors, which are generated by embedding models to encapsulate the semantic content of objects like articles, images, or videos. These vector embeddings are stored in a vector index as points in a multidimensional space, allowing for AI-enhanced semantic search by identifying relationships between similar vectors. This system significantly improves performance and efficiency over traditional indexing methods, enabling applications such as AI chatbots, recommendation engines, anomaly detection, and sentiment analysis. By facilitating similarity search across vast datasets, vector indexes play a crucial role in modern data analysis and machine learning, offering powerful tools for applications like product catalogs, video streaming, and sentiment analysis by mapping words into a multidimensional space to discern patterns and emotions.