Owl update is one of the Google search algorithm changes made in 2017, and is mainly aimed at fake news countermeasures.
In response to the fact that low-quality content such as fake news pollutes the Internet, we have made changes so that high-quality content that is more reliable than such content is displayed at the top.
The following content was affected. The ones that lead the user to the wrong way (eg conspiracy theory) by assertions that are not based on existing myths. Aggressive contents that the user does not want (hate speech etc.)
At the same time, a user feedback function was added to the emphasized snippet and autocomplete (suggest) of Google search, and Google has come to utilize it for algorithm improvement.