What is spam filtering?

Spam filtering refers to the process of detecting and preventing unwanted, unsolicited, and often malicious electronic messages, commonly known as spam. It is primarily used in email systems to block spam emails from reaching users' inboxes, and is also employed in other communication channels like instant messaging and social media to filter out spam messages or posts. Spam filters use various techniques, including content analysis, blacklists, and machine learning, to identify and block spam.