POP3 vs IMAP - What's the difference?

What is POP and IMAP? How does email work? This is an animated video explaining the difference between POP and IMAP. These are email protocols that are used to retrieve email from an email client, such as Microsoft Outlook. Should I choose POP or IMAP? Which one is better?

Видео POP3 vs IMAP - What's the difference? канала PowerCert Animated Videos