While +Bradley Horowitz has called 2013 "the year of Google+," 2012 was itself a big year, featuring a site-wide redesign, the launch of Local, Events and Communities, and hundreds of other updates.
Our coverage was started by +Lee Jarratt in June, so updates after that are linked to our original posts, and the content becomes much more detailed. Starting in January, here's how G+ has changed:
January
January marked the launch of Search Plus Your World, the first integration of Search and Google+ and a game-changing feature for G+.
It was also a great month for Google-loving teenagers across the world, as people as young as 13 could +Bradley Horowitz announced the availability of Google+ sign-ups for people as young as 13 (down from 18 years). Another new and important update was support for nicknames and alternate names, a relaxation of the controversial "real names" policy.
Highlights
Search, plus Your WorldSupport for nicknames and alternate names
Google+ available for teens
Other Updates
February
In February, Instant Upload finally came to the Google+ iOS app, giving iPhone users the ability to store and share every photo. It also included a nifty "shake to send feedback" feature.
The +1 button received a big update, allowing sharing straight from the button after it is clicked.
Highlights
March
Hangouts were given a lot of love in March, from new apps like Scoot & Doodle to Google Docs support to new masks. Perhaps most importantly, developers were able to quickly and easily share the apps they had created for the first time.
Also important were the improvements to spam management and control, with spam comments being grouped and hidden so as to distract less from the overall experience.
Highlights
Other Updates
April
A fantastic month for the desktop Plus user, as Google announced a massive overhaul of the design and UI, featuring additions of the ribbon navigation menu, cover photos and much more. Though some users joked about the addition of #whitespace, the design offered a more dynamic and much richer experience, and set a design language for future updates to Google+ apps.
Highlights
Google+ RedesignOther Updates
Photo integrations for Gmail and Google+Address book on G+ profiles
Google+ Share button
Rich Snippets and Hashtags in Android app
Sharing Google Drive photos
Hangouts On Air Improvements
New Blogger Gadgets
YouTube and Google+ integration
May
Google+ Local, which featured Zagat scores and reviews from Google+ profiles, was launched in May, changing forever how plussers decide where to go for lunch.
Both Android and iOS received stunning, photo-centric design refreshes, a bold departure from the more conservative previous design.
Highlights
Other Updates
June
Another big month for Google+ as +Vic Gundotra announced at Google I/O the availability of a now widely used feature, Events, as well as a greatly enhanced mobile app with full support for tablets and unique and innovative features such as Party Mode.
The Google+ History API was also announced, and though still in developer preview, is a promising way to collect and share moments from across the web.
Highlights
Other Updates
Featured Apps on Hangouts PageProfile sharebox and cover photo improvements
Option added to display your YOB on your G+ profile
New Hover-Over Icons For Photos
New 'Browse People' UI
Photo and Video Sharing UI tweaks
New Slideshow Button
July
Though less exciting than I/O in June, July had some important changes of its own. Gmail got much deeper Google+ integration, with Hangouts replacing the normal video calls. Search, News and YouTube also received tighter integration with our favorite "social layer."
Highlights
Other Updates
Live transcription integration for Hangouts
Adverts Displayed on Google+ Local
New Notification Animation
Pro broadcast features for Hangouts On Air
"Learn More" Page Redesigned
Upcoming Events Displayed Next to Stream
Share Link in Google Search in Place of the +1 button
Tighter Google+ Integration in Search
New Pages Banner Displayed on Right of Page Profile
More Google+ Features Added to Google News
"Frequently Contacted" added to people browser
Adverts Displayed on Google+ Local
New Notification Animation
Pro broadcast features for Hangouts On Air
"Learn More" Page Redesigned
Upcoming Events Displayed Next to Stream
Share Link in Google Search in Place of the +1 button
Tighter Google+ Integration in Search
New Pages Banner Displayed on Right of Page Profile
More Google+ Features Added to Google News
"Frequently Contacted" added to people browser
August
Google+ also made a big push into the enterprise in August, with the ability for Google Apps customers to restrict posts to their domain and other apps integrations.
Highlights
White Borders around Photos
Hover-Over Games List
Download a Photo Album in 1-click
Posting Location Shows Map Preview in Posts
Hangouts On Air available in 10 more countries
Google+ App Updated
The Hangouts API Updated
Hangouts Gains Private Messaging Feature
New Search Filter: To You
UI Update for Effects Hangout App
New Delete Shortcut in Photo Viewer
Birthday Banners on Google
Start a Hangout From Google Calendar
Hover-Over Games List
Download a Photo Album in 1-click
Posting Location Shows Map Preview in Posts
Hangouts On Air available in 10 more countries
Google+ App Updated
The Hangouts API Updated
Hangouts Gains Private Messaging Feature
New Search Filter: To You
UI Update for Effects Hangout App
New Delete Shortcut in Photo Viewer
Birthday Banners on Google
Start a Hangout From Google Calendar
September
Highlights
Nik Software Purchased, G+ hits 100,000,000 monthly activesPublic invites, Blocking, and 18+ only for Hangouts
Other Updates
October
October saw small updates that touched almost every corner of Google+, from a UI refresh to Instant Upload to the ability to share Google Drive documents with preveiws in a post. With the announcement of the "Photo Sphere" capability in Android 4.2 came the ability to view these immersive panoramas in Google+.
Highlights
November
November featured one of the biggest UI changes since the April redesign, with a sleek new look for Hangouts. A brand new traffic tracking feature, "Authorship Analytics," was rolled out to a small number of users. There's still no word on when it will reach a broader audience. Google Play also received some Google+ love, with reviews now requiring a Google+ account.
Highlights
Other Updates
December
Although December has only just been and gone, it's nice to look back at what could possibly be the biggest month in 2012 for Google+ product announcements and updates. Communities, one of the most transformative G+ features to date, launched to great success. In another #seasonforshipping, over 24 app updates were announced in a single day by +Dave Besbris. And Nik Software acquisition finally came to fruition with the release of Snapseed, free for all platforms.
Highlights
Android app updated with Communities, gifs, and moods
iOS app updated with new conversation cards
Snapseed app released, free on all platforms
iOS app updated with new conversation cards
Snapseed app released, free on all platforms
Other Updates
Pages Now Able to Interact with People Who Haven't Circled Them
New Micro-Site - Hang Out With the Family
Fullscreen Hangouts on Air
Me on the Web
View Photos in Full Screen
New Micro-Site - Hang Out With the Family
Fullscreen Hangouts on Air
Me on the Web
View Photos in Full Screen
What was your favorite?
It was a crazy year with hundreds of updates and new features. To discuss your favorite update, join the discussion on our Google+ post. And continue to follow Google Plus Daily for all of the G+ updates in 2013!