Synonyms are words or phrases that have similar meanings or connotations, and understanding them is crucial for search engines to provide more relevant results. By accommodating synonyms in search functionality, businesses can improve the accuracy of search results, reduce missed connections between customer queries and desired content, and enhance the overall customer experience. This is particularly important for industries like ecommerce, medicine, law, and academia, where terminology can vary significantly across different fields and languages. By integrating synonyms into their search engines, businesses can provide better search results that cater to a wider audience and improve shopper retention levels and sales.