The most substantial of the thirteen functional patches included in the update is the "improved memory performance in certain circumstances", which should solve the baffling memory management issue that was causing apps running in the background to unexpectedly shut down.
It's not a bad discount, however US users are being offered a code which discounts the Pixel 3 and 3 XL by $125 (or around $173.6 AUD).
The app was uploaded to the Play Store today but is only accessible if you own a Pixel device.
There are a handful of changes being patched into various media apps and features across the entire Pixel phone line. You should also notice better Hotword recognition and performance as well. First, Google has adjusted the volume behaviour when connecting to a Bluetooth device, which applies to all Pixel phones.
As you can see in the chart above, some of these fixes address older Pixel phones as well, including the previous generation and the original Pixel and Pixel XL. How big the discount is will depend on your subscription tier - this editor, who subscribes to a 1TB plan, got a $200 promo code while another person on a 200GB plan got $125 code. The patch is rolling out via OTA although factory images are available to download and manually flash if patience isn't your strong suit.