Google has made it easier to get Google Now on your desktop. If you're unfamiliar with Google Now, it's Google's personal assistant that loads information such as weather, sports scores, traffic, and more in one location.
Before you can get Google Now on the desktop, you'll have to activate Google Now on your mobile device (either your phone or tablet). Google Now is available within the Google Search app on both iOS and Android. In either app, Google Now is in the Settings section. For iOS, click the gear, and turn on Google Now. On Android, you can go directly through the Google Setting app, then click Search & Now, and toggle Google Now to "On." You'll be able to set up your preferences from there.
To get Google Now on the desktop, download and install Google Chrome Beta. Google Now was previously built into earlier unstable builds of Google Chrome. With Now coming to Google Chrome Beta, it's closer to being fully baked into the regular version of Chrome.
When you open up Chrome Beta, log in using the same Google account you're using on your mobile device. Google Now notifications will appear in the Google Chrome Notification Center (it's that little bell you'll see in the menu bar on OS X or in the taskbar on Windows). If you don't see Google Now in the Notification Center, click the gear icon, then make sure there is a check mark next to Google Now.
If for some reason, you're still not seeing Google Now notifications, there is still hope. In Chrome Beta, type "chrome://flags" (minus the quotes) in the address bar and hit enter. You'll be taken to an experimental section of Chrome where you can toggle features off and on. Find Google Now and set it to "Enabled." You'll then have to restart Chrome Beta for the changes to take effect. In the case you're still not seeing the Now notifications, go back to chrome://flags, find "Enable Rich Notifications," then change the setting from "Default" to "Enabled." Restart Chrome and it should be good to go.
Google says that Now on Chrome does not show the entire set of cards you'd see on your mobile device, but this is just the beginning of Now on the desktop. If you'd like to modify settings on Google Now, you'll have to go back to your mobile device to make those changes. Chrome Beta does not give you the ability to edit Google Now settings just yet.