How meta-search engine work?

Meta-search engines aggregate search results from multiple search engines and databases simultaneously. When a user submits a query, the meta-search engine sends that query to various search engines, collects the results, and then compiles them into a single list. This process allows users to access a broader range of information without needing to search each engine individually. The results are often ranked based on relevance or popularity, providing a more comprehensive overview of available content.