Roughly a year after it bought Songza, an online radio service with playlists curated by "music experts," Google has added an ad-supported radio service to Google Play Music. The move essentially integrates Songza-like functionality into Google's streaming music offering.

The new radio service exists as an option in the sidebar of Google Play Music, alongside the ability to have recommended stations scattered around the "Listen Now" homepage. It works a lot like Pandora—stations can be created from artists or genres, and songs can be rated with a thumbs up or thumbs down. Play Music adds Songza-style "situation" stations for things like "Working to a beat" or "Boosting your energy." Play Music has a Top Charts and new releases section now, too.

So far, we've seen ads show up in the form of square banners on the side of the page and as occasional full-screen interstitial video ads. Like YouTube's TrueView ads, the video that popped up for us could be skipped after five seconds. The banner ads seem to only show up on pages where there is room for them, like individual station pages or genre lists, but they are kept out of the already visually complicated grids-of-cards that often pop up.

Ads have only showed up for us while browsing the station parts of Play Music. The Music locker portion still appears to be ad-free. On stations you get a limited number of skips, and when you hit the limit a tooltip will pop up suggesting that you subscribe to the $9.99-a-month All Access plan.

Everything is done in the style of the new Google Play Music redesign that launched last month. There are big, full-bleed images and lots of cards for everything. It's very pretty.

The new radio option is live on the US Play Music website right now, and Google says the Android and iOS apps will be rolling out this week. Google Play Music now offers just about every type of music consumption imaginable: a free cloud music locker for 50,000 songs, the new ad-supported radio service, à la carte purchases of songs and albums, and an all-you-can-stream $9.99 subscription service with offline playback.