"Siri, how do I write for voice search?" That is what 2019 sounds like.
The top things you can do to write for voice search is to write how you speak, use specific content and answer the question. It’s not enough to only use one to two key words in writing.
Voice search isn't like a typed query. When people use voice search they use complete sentences for their questions.
For example, "best brush for dog" becomes "what is the best brush for a dog"