If you are a newbie on WordPress, you will be surprised to get 100 more comment spam. Comment spam is the flood message, sent by someone out there whose not important contents. Usually, the comment spam contains an invitation to a website, commercial advertising, sex products, etc. Of course you will delete this comment spam until exhausted.
To overcome this problem, I suggest you using Akismet to protect your blog from comment spam attacks. This plugin serves to select where the comment spam or not. If found comment spam, your comments will not be directly in your post, but will be placed in quarantine spam in your dashboard.
Akismet is a top de-spamifying for wordpress. So, activate your Akismet plugin immediately. If your site has high traffic, you must need more protection. In addition Akismet, you can use Growmap Anti-Spambot, Sabre, atau WP-reCHAPTCHA.
One of most spam comments type are trackback (trackback spam). Increasing number of visitors also increased trackbacks coming into your post. To anticipate it, you can use Simple Trackback Validation Plugin. This plugin serves to filter incoming trackbacks on your blog. You can create separate filter which websites are allowed to send a trackback on your site.
Many ways to secure our Blog, but it not eternal and perfect forever. The most perfect way is to always be vigilant and on guard!
Good luck to war with spam comment!