The company had last year hinted of an upcoming desktop version for the Google Now, which debuted on Android in 2012 as part of Google search app. And last month launched as an experimental feature within Chrome Canary.
The Google Now "cards" show up automatically if you’re already using Google Now on Android or iOS, and signed into Chrome with the same Google account.
Google Now is seen by analysts as the search giant’s biggest step towards a convergence of Chrome and Android. The "Google Now" notifications is active by default, and to disable click the bell icon in your notification area, then click the gear icon and uncheck the “Google Now” box.