WebMail, what is it, what does it do, what is in it for me? Webmail is an extension to your normal email account, which provides you with access to your email, no matter where you are! Home, office, internet cafés, etc.
, in doesn't matter.
If you have internet access and a web browser, you can send and receive your important email! There are a number of great advantages to it, and some disadvantages.
But what are they? Let's take a look: Advantages

• Access anywhere - you are not restricted for access.
  If you have internet access and aweb browser, you can access your own email account.
  This truly portable solution is great for nomads, travelling consultants, away from home, on holidays, etc.
  Your email is stored on the server and is always available when you need it.
  
• Central maintenance of the software, backups, upgrades and security updates are all handled by the administrator.
  You don't need to worry about keeping up to date with the latest version of your email client, the administrators keeps you up to date with all the latest features in a stable and secure environment.
  
• Some providers also offer spam protection.
  Make custom black lists, white lists and say who you will accept email from, and who to reject mail from! Helps sort down the amount of junk mail from your important legitimate email.
  
• Anti-virus is also usually built-in, so you don't need to worry about keeping your computer's anti-virus protection software up to date if you are primarily using your computer for email access.
  

Disadvantages

• You must stay online and connected to the internet if you wish to read or write more than one email.
  
• Commercial and free webmail providers are sometimes limited with storage space.
  Unlike an email client you run on your computer, you cannot keep the messages on your own personal storage or hard drives, though the user will sometimes have the ability to download important emails to their hard drive later on.
  
• Many webmail providers show advertisements during your webmail session or add tag lines or notices on the bottom of your sent email promoting the webmail service.
  You may or may not want this.
  
• Webmail accounts are by tradition, insecure.
  Everything you read and type, be in reading an email after it has been opened, or replying to that email, everything is in simple plain text and could be intercepted by someone who is mean and wants to be a real hassle to you.
  It is uncommon for this to happen, but very possible.
  Some webmail providers offer secure login or as they are technically called, an SSL login.
  This means everything sent and received while you are logged in is encrypted and cannot be easily picked up by anyone.
  
• Technically, webmail is slower than a normal email client because you have to transparently download and view the webmail web page while it's loading your email.
  This may not matter in the end, but it's something to keep in mind.
  

Webmail is a great utility to have.
I highly recommend it.
Many people actually mix the two, and use an email client at home working using webmail at work, or vice versa.
It is really a matter of preference.
Give webmail a try anyway.
You may find you prefer it after a while.