Webmail is a software application that lets you work with an e-mail account online through a browser and without creating the account in a desktop email client such as Microsoft Outlook or Apple Mail. This will make it possible to make use of your e-mails from any location or any personal computer if you are not capable to use your personal computer - in case you're on vacation and you visit an Internet cafe, for example. Webmail clients don't offer as much options as a regular PC app, but they still offer you a range of options, like sending and receiving email messages, setting up customized signature and employing address books. If you set up an e-mail address inside a desktop program, you need to use the IMAP protocol during the process in case you want to view all emails later using webmail, as the online app cannot display messages from your PC if they have been already downloaded with all the POP mail protocol.