Comment spam is one of the serious issues that needs to be solved as soon as possible. In fact, most of the spam comments hitting your site submitted by bots. They are the software scripts that look for comment forms on the web to submit spam comments. These bots process either JavaScript or cookies to submit spam.

With the use of WP-SpamFree Anti-Spam plugin, you can prevent your site from bot spamming. It uses a combination of JS and Cookies to eliminate humans from spambots – this will protect your blog from automated spam comments.

The process is simple! It simply checks the cookie when a user attempts to post a comment. If the cookie exists it means that user is not a spam bot and if it doesn’t, then the user is likely a spam bot. The plugin weeds off automated blog comment spam submitted by bots, along with trackback and pingback spam.

A Guide to Deal with Comment Spam on WordPress