Boolean search allows users to combine keywords with operators like AND, OR, and NOT to produce relevant search results. Some common boolean operators are AND (to search for results with both keywords), OR (to broaden search by including multiple keywords), and NOT (to exclude specific terms). Other operators include quotation marks (for exact phrases), parentheses (to group terms), asterisk (as a wildcard), tilde (for synonyms), and filetype (to filter file types). Boolean searching allows for complex queries to efficiently find information that matches the user's specific needs.