Google updated its search quality evaluator guidelines back in August, placing a greater focus on the ‘E-A-T’ principles of expertise, authority and trust.
The first few weeks of the update was characterised by leading brands witnessing significant and sometimes erratic changes in their organic search visibility. Some brands saw their visibility almost wiped out entirely, only to return to normal shortly afterward. Weeks of volatility followed as Google appeared to tweak the dials on the updated algorithm.
https://www.affiliateinsider.com/2019/01/25/google-e-a-t/
User experience (UX) is the overall experience a visitor has on a website, in a program or in a mobile app. It's not any single design element or layout that defines the experience -- instead, it is a comprehensive compilation of many little interactions woven together, producing positive or negative feelings about the website and, by default, the parent company.
The emotional connection that users feel as a direct result of the UX design directly impacts brand identity, consumer retention and a business's bottom line.
https://www.entrepreneur.com/article/313003/