Junk mail refers to unsolicited advertisements or promotional materials sent through the postal service or email. This type of mail is often mass-produced and targets a wide audience, aiming to sell products or services. Common examples include flyers, catalogs, and credit card offers. Many people find junk mail annoying because it clutters their mailboxes and inboxes. While some junk mail can be easily discarded, others may contain offers that seem appealing. To reduce junk mail, individuals can opt-out of mailing lists or use filters in their email accounts to manage unwanted messages more effectively.