Milvus v2.4.3 introduces full-string metadata matching, allowing users to match strings using prefix, infix, postfix, or character wildcard searches. This update makes metadata filtering more versatile and powerful. The blog demonstrates how to use this feature with an example using IMDB movie data. It covers connecting to Milvus Lite, transforming movie text into vectors, inserting vectors and metadata into Milvus, and handling user queries by searching for similar data vectors. Additionally, the blog provides resources and further reading on using array fields in Milvus and filtering searches.