Wordpress api key is very important for using the wordpress jetpack plugin. For hosted wordpress sites wordpress api key is very important. For protect your site from spam comments you need the askimet api key. which is common for jetpack and akismet plugin.
With Wordpress blogs and sites spam comments is very big issue. That waste our lot of time. There is very nice plugin called Akismet by wordpress. Which is helpful for catching the spam comments but that is not smart enough. Some spambots simply hit the wp-comments-post.php and wp-trackback.php files directly, without scanning your site to find the real names of these scripts. You can foil such bots by renaming these files.
This files will not track which comment is spam. In this tutorial I will tell you about how to change the filename of wp-comments-post.php file another name. This way you can easily protect your blog against spammer comments.