Conversational Texts! Here, is your answer!
You need to publish website content that is more in human form and not in computer language. To understand it better, focus on the traditions typing search and think how one would search using voice.
For example: “best carrot cake recipe” – Typing Search
“How can I cook the best carrot cake quickly?” – Voice Search
Voice search has a more conversational tone to it and, the phrases are longer. One of the reasons for its popularity is also that it is 3.5 times faster than the typing search, A user will not write a full phrase while typing in the search box but, because Voice Search is easy shows results quick, users will let go of the confusion and directly speak what their mind tells.
So the key lies in optimising the web content which is more in a conversational form. Add a FAQ Page to the website is one of the best ways for Google to fetch in your website results. As Google is changing to becomes an “Answering Engine”, as soon as the user hits with a query the Google Speaks the most apt result which lists in the “Feature Snippet”.
Optimise content by adding a Feature Snippet on every page. There are a lot more likely chances for Google to index and feature your page by listing a few of the important things. Use question-answer content form and make the articles longer by adding keyword phrases in discussion form.