There are many update of Facebook feature. Here is an update feature of them. Last update on 2016.

1. Facebook update
Apr 2016

2. FB Lead Ad
Source : https://www.facebook.com/business/news/lead-ads-launch2
Retrieve and respond to leads in real-time

3. FB Canvas
www.facebook.com/business/ads-guide/clicks-to-website/canvas/3
Storytelling and Showcase your products
Content in the Ad
• Full screen image
• Text
• Button for offsite links
• Image carousal
• Auto-play VDO
• Full-Screen tilt-to-pan
image
• Product Set

4. Facebook 360 degree
A 360 video is created with a camera system that
simultaneously records all 360 degrees of a scene.
Viewers can pan and rotate a 360 video's perspective to
watch it from different angles.
These videos have a “360 video” label in the lower left-
hand corner and are viewable on computer, iOS devices
and Android devices.
360 videos on computer
When watching a 360 video on a computer, the viewing
angle is changed by dragging with the mouse.
Make sure you're using the latest version of your web
browser (ex. Chrome, Firefox). 360 videos on Facebook
aren't viewable on Safari or Internet Explorer.
360 videos on mobile
On iOS and Android mobile devices, the viewing angle of a
360 video is changed by dragging a finger across the
screen or by navigating with the device.
Make sure you're using the latest version of the Facebook
app. If you're using an iOS device, it should be an iPhone
4S or newer or an iPad 2 or newer. The iOS device also
should be running iOS 7 or later. If you have an Android
device, make sure you're using Android 4.3 or later.
https://www.facebook.com/Facebook360/posts/1749518261933308

5. Facebook bot message
Bots for Messenger are for anyone who's trying to reach
people on mobile - no matter how big or small your company
or idea is, or what problem you're trying to solve. Whether
you're building apps or experiences to share weather
updates, confirm reservations at a hotel, or send receipts
from a recent purchase, bots make it possible for you to be
more personal, more proactive, and more streamlined in the
way that you interact with people.
The Messenger Send / Receive API will support not only
sending and receiving text, but also images and interactive
rich bubbles containing multiple calls-to-action. Developers
can also set a welcome screen for their threads to set context
as well as different controls. Starting today, all developers
and businesses will have access to documents to build bots
for Messenger, and submit them for review. We will gradually
accept and approve submissions to ensure the best
experiences for everyone on Messenger.
http://newsroom.fb.com/news/2016/04/messenger-platform-at-f8/

6. Facebook LIVE API
Facebook Live could take live video to a new level of
popularity. Now third-party developers will get a chance
to participate.
Here are a few of the ways you can use the Live API:
1) Stream video from more than just your smartphone
The Live API lets you build video streams that mix
multiple video and audio sources and introduce special
effects. These can also include programmatic sources
like games or screencasts.
2) Create new ways to interact with viewers
When you combine the Live API with Facebook’s Graph
API, you gain access to your live video’s comments,
reactions, and mentions. You can use this information to
reflect viewer engagement in real time and create on-
screen graphics that show live poll results, analyze
comments, and enable comment moderation.
3) Go live from a standalone camera, or even a drone
The Live API can enable spectacular live videos through
seamless hardware integrations. Hardware
manufacturers can integrate with the Live API to let
people go live directly from their devices.
https://www.youtube.com/watch?time_continue=13&v=KAze1wH9TGc
https://media.fb.com/2016/04/12/introducing-the-facebook-live-api/

7. Facebook instant article
Publishers of any type, anywhere in the world can deliver an incredibly
fast and immersive reading experience for people on Facebook.
1. Fast and Responsive
Leveraging the same technology used to display
photos and videos quickly in the Facebook app, articles load instantly
in News Feed, and readers really like the speed.
2. Interactive and Immersive
New creative tools bring your stories to life and are as
easy to use as they are transformative for the mobile storytelling
experience.
3. Engaging and Sharable
The fast, immersive reading experience inspires people
to share Instant Articles 30% more often than mobile web articles on
average, amplifying the reach of your stories in News Feed.
4. Flexibility and Control
Flexible monetization options support the way you grow your publishing business and you choose what works best for your business.
5. Measurable and Trackable
Understand how people read and engage with your Instant Articles through data Facebook provides as well as data from in-house
analytics tools or third-party measurement services.
6. Simple and Scalable
Publish any type of article, from daily news to longform features. Instant Articles integrate seamlessly with your current workflow and
existing production tools.