Google now on tap missing

Hi, yesterday finally I got marshmallow update for my moto x play (iusacell/at&t Mexico) and did the update, I did all the updates available and I can't find anywhere how to enable Google now on tap, I saw on a web page that google on tap was in google launcher settings but I can't find it, at first I thought it was because I use a Google apps account, so I added my gmail account and still can't find where to enable it

Anyone knows why is this happening?

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