Test, validate and match regular expressions
Matches lines that start with 'Search', followed by one or more characters, then 'Engine', more characters, and finally 'Marketing'—allowing flexible filler or spacing between the words. With the multiline flag, ^ anchors to the start of each line, and the global flag finds all occurrences. Useful for scanning documents, titles, or logs for 'Search Engine Marketing' variations like 'Search-Engine-Marketing' or 'Search & Engine Marketing'.