How we fought webspam - Webspam Report 2017

Thursday, June 28, 2018

Googlebot presenting the Webspam Report 2017

We always want to make sure that when you use Google Search to find information, you get the highest quality results. But, we are aware of many bad actors who are trying to manipulate search ranking and profit from it, which is at odds with our core mission: to organize the world's information and make it universally accessible and useful. Over the years, we've devoted a huge effort toward combating abuse and spam on Search. Here's a look at how we fought abuse in 2017.

We call these various types of abuse that violate the webmaster guidelines "spam." Our evaluation indicated that for many years, less than 1 percent of search results users visited are spammy. In the last couple of years, we've managed to further reduce this by half.

As we continued to improve, spammers also evolved. One of the trends in 2017 was an increase in website hacking—both for spamming search ranking and for spreading malware. Hacked websites are serious threats to users because hackers can take complete control of a site, deface home pages, erase relevant content, or insert malware and harmful code. They may also record keystrokes, stealing login credentials for online banking or financial transactions. In 2017 we focused on reducing this threat, and were able to detect and remove from search results more than 80 percent of these sites. But hacking is not just a spam problem for search users—it affects the owners of websites as well. To help website owners keep their websites safe, we created a hands-on resource to help site owners strengthen their websites' security and revamped our help resources to help site owners recover from a hacked website. The guides are available in 19 languages.

We're also recognizing the importance of robust content management systems (CMSs). A large percentage of websites are run on one of several popular CMSs, and subsequently spammers exploited them by finding ways to abuse