Many of us have seen the recent push by Google prompting its voice search capabilities in their "OK Google" ads. They have been in subways stations, at the World Series, and even at the Top of the Rock. Google’s push along with Apple’s Siri, and Microsoft’s Cortana market presence in voice search shows a real growth in this area. In fact a recent Google study showed that 55 percent of teens (13-18) use voice search every day. Fifty-six percent of adults said using voice search made them feel "tech-savvy." So if the use is that high, what are the implications for search marketers? While you can’t yet pull data to understand if a search was done via voice or text based search (yet), you can look at the conversational keywords within a search. For this article Search Engine Watch looked at how many times question keywords appeared in search queries like "who," "what," "where," "when," and "how." What they found was a 61 percent growth in these phrases year-over-year. The biggest growth comes from phrases that directly tie to voice search and in particularly the Knowledge Graph (or the ability for these voice search tools to reply directly with an answer). For example, "How old is Iggy Azalea?" or "Who is married to Tom Brady?" "Who" phrases were up 134 percent and "How" phrases were up 81 percent. Get the full story at Search Engine Watch