In 2016, 40% of all web traffic originated from bots -- and half of that came from bad bots. A bot is simply a software application that runs automated tasks over the internet. Good bots are beneficial. They index web pages for the search engines, can be used to monitor web site health and can perform vulnerability scanning. Bad bots do bad things: they are used for content scraping, comment spamming, click fraud, DDoS attacks and more. And they are everywhere.
Article Link: http://feedproxy.google.com/~r/Securityweek/~3/KU0POs2u2R4/advanced-persistent-bad-bots-are-rampant