If you run a blog, then you may have chosen to allow comments on your website. This can be a good move for certain sites because it promotes engagement, encourages feedback, and helps you establish authority.

But hackers and bots often leave spam comments in order to link visitors back to their own websites. Their goal? Higher site rankings and an increase in traffic — for the spammers, of course.

Racking up lots of comments seems like a positive, but too much spam can decrease search engine rankings, expose your visitors to viruses and scams, and make it look like you don't care for your website. And this is, well, bad for business. 

The thing with comment spam is that not all of it is created equal. Most of the time, it looks shady. But, sometimes, it actually looks legitimate. So how do you spot it on your blog?

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