Get the Moz Top 10. The 10 most valuable pieces of content we can find for SEOs. Every 2 weeks. Amazon Alexa’s AI operating system fell to 69% share of smart speakers in the third quarter, down from over 80% in the first half of 2017 as Google Assistant made strong. its Dingdong speaker remained the top ranking brand in China. PALO ALTO, Calif. — Facebook founder Mark Zuckerberg appeared…