What are splogs?
Spam blogs or Splogs is a black hat SEO technique, which requires creating thousands of blogs on a free blog service (eg. blogspot.com), which were linked between each other and subsequently gain links to your website via blog comments or spam. Trust me, this doesn’t work no more, as the comments wouldn’t be unique, relevant or actually considered as content. If you own your own blog, please make sure you create good and interesting content as it works better.