Spam filters are software or plugin that use for your blog to filter any unnecessary comment from unknown source or some spammer just to fill in your comment box, I realize that having a spam filter is the best way to avoid from being attack by unresponsible people just to have their link in your blog to get a backlink.
So to filter all the problem what you have to set a spam plugin in your blog, for those who using own domain and set the blog on wordpress it is much easier, then please choose a plugin, I recommended “Akismet plugin”, because I’m using it and I know how good it is, but first you have to get the API code and after that you can activate the Akismet function.
Although all my blog I’m using the Akismet plugin, it is very useful and I don’t regret to install this plugin, and it save all my time to filter any spammer manually, act fast before is too late, because it will getting worse if you don’t start early, happy blogging!!
thanks for sharing nice blog post