At the moment, there are about 147 million blogs, and other 54,000 new ones emerge on a daily basis. Blogspot, WordPress and LiveJournal are three of the most popular services that offer free blogs. 99 percent of the total number of spam messages posted on blogs and forums is sent by spam bots. Blog spam is one of the threats that affect both self-hosted blogs and those offered as a service. Blogs are usually created and maintained to add a plus of value to the business or personal image, or it may be the very business itself.”]
Source: https://www.bitdefender.com/blog/hotforsecurity/safe-blogging-guide/