1. PageSpeed appears to play a major role in voice search SEO.
2. HTTPS websites dominate Google’s voice search results.
3. Google prefers short, concise answers to voice search queries. The typical voice search result is only 29 words in length.
4. Schema may not play a key role in voice search rankings.
5. Authoritative domains tend to produce voice search results significantly more than non-authoritative domains.
6.Content that ranks well on the desktop tends to rank in voice search.
7. Simple, easy-to-read content may help with voice search SEO.
8. We found that very few voice search results had the exact query in their title tag.
9. The average word count of a voice search result page is 2,312 words.
10. Content that ranks highly in desktop search is also very likely to appear as a voice search answer.
11. Appearing in a Featured Snippet may help you rank in voice search.
Refer more...
https://searchengineland.com/study-11-v ... ked-293221