What is Akismet?
Akismet is a service that filters spam automatically from blog comments. It works in a similar way to how an email program (like Outlook) filters spam. The Akismet web service checks for spam comments and puts these in the spam section in the plugin’s admin area. Here, you can approve, trash, or leave comments where they are.
Akismet is a sophisticated system that knows the tricks and techniques used by spammers from watching millions of blogs and forums. It knows all the tricks and can detect comments that
don’t look legitimate.