The Fourth Folio is a collection of plays by William Shakespeare published in 1685. It is the fourth edition of the collected works, following the earlier folios released in 1623, 1632, and 1664. This edition includes 36 plays, some of which were not published in previous folios, and it aimed to preserve Shakespeare's works for future generations. The Fourth Folio is significant because it reflects the evolving understanding of Shakespeare's contributions to literature. It also provides insights into the theatrical practices of the time and the popularity of his plays in the late 17th century, showcasing the enduring legacy of his work.