To avoid many of the spammers on a blog, a lot of different plugins available for you. The use of the plugin is intended to allow script code that is typically used to automatically insert comment could not be used again. One characteristic of the comment spam is usually identified with access to the blog is slow when loading, more errors, and the number of comments that go up drastically.
The use of this plugin is quite simple, as you can see the “really simple captcha” plugin. With its simple and accompanied by a few characters, an application and script code can not be used anymore, so you can avoid the blog spam the comment that was one of the causes of declining performance of a blog.
Hope if you have this plugin, your blog can keep clean from the spammer activity, so your blog can be run smoothly and increase performance, especially for some of the spam that occur.