Structured search is a method of retrieving information from databases or search engines using specific criteria. It allows users to define their queries with particular parameters, such as date ranges, categories, or keywords. This approach helps in narrowing down results to find relevant information more efficiently. In contrast to unstructured search, which relies on natural language processing, structured search uses predefined fields and formats. This makes it particularly useful in applications like e-commerce, where users can filter products by attributes like price, brand, or size, ensuring they find exactly what they need quickly.