Homonym: junk mail (Spam)
Junk mail refers to unsolicited advertisements or promotional materials sent through the postal service or email. It often includes flyers, catalogs, and coupons from various companies trying to sell products or services. Many people consider junk mail a nuisance because it clutters their mailboxes and inboxes.
Businesses use junk mail as a marketing strategy to reach a large audience at a low cost. While some recipients may find useful offers, most view it as unwanted communication. To reduce junk mail, individuals can opt-out of mailing lists or use filters in their email accounts to manage unwanted messages more effectively.