This is the 2543rd most frequent Spanish word.
busquen
"Busquen" means "look for" or "search" (command form for "you all" in Spanish).
This is an imperative suggestion addressed formally or to a group, using the 'ustedes' form of 'buscar'.
Busquen la respuesta en el libro.
Look for the answer in the book.
This suggests an action in the subjunctive mood after a conditional clause, using 'ustedes' form.
Si no encuentran su camino, busquen ayuda.
If they do not find their way, seek help.
This expresses necessity and uses the subjunctive mood to indicate an action dependent on the main clause.