Before you start exploring voice search, make sure you’ve optimized your site images as fully as possible. While a lot of energy is being spent trying to figure out how to take advantage of the anticipated growth in emerging areas like voice search, there is a much easier search medium that seems to be underutilized: image search. According to Rand Fishkin’s analysis of Jumpshot and Moz data, image search on Google is the second most highly used search platform behind Google.com and it is searched more than the remaining Top 10 web properties combined.