Google Update Online

Google announced that if you are redirecting your mobile users from a specific landing page listed in Google to your mobile home page, then you need to watch out! Because Google will warn the mobile searcher that you will not be taken to the specific page you are searching for, instead, you may be taken to the home page of the site.
Google's warning reads, "may open the site's homepage." Then it asks you if you want to try anyway or learn more. I assume this will lead to a much lower click through rate and that is important.
Following are the few ways if sites offer from this:-

Try it out on your mobile device.
Set your user agent on your browser to a mobile user agent.
Check your Google Webmaster Tools under crawl errors and then if you see "faulty redirects," they would show up there.

If they do, then you need to make sure to set up your mobile site properly, at least according to Google's mobile best practices

Knowledge Graph Expansion — December 4, 2012

Google added Knowledge Graph functionality to non-English queries, including Spanish, French, German, Portuguese, Japanese, Russian, and Italian. This update was "more than just translation" and added enhanced KG capabilities.

Panda #22 — November 21, 2012

After some mixed signals, Google confirmed the 22nd Panda update, which appears to have been data-only. This came on the heels of a larger, but unnamed update around November 19th.

Panda #21 — November 5, 2012

Google rolled out their 21st Panda update, roughly 5-1/2 weeks after Panda #20. This update was reported to be smaller, officially impacting 1.1% of English queries.

Page Layout #2 — October 9, 2012

Google announced an update to its original page layout algorithm change back in January, which targeted pages with too many ads above the fold. It's unclear whether this was an algorithm change or a Panda-style data refresh.

Penguin #3 — October 5, 2012

After suggesting the next Penguin update would be major, Google released a minor Penguin data update, impacting "0.3% of queries". Penguin update numbering was rebooted, similar to Panda - this was the 3rd Penguin release.

August/September 65-Pack — October 4, 2012

Google published their monthly (bi-monthly?) list of search highlights. The 65 updates for August and September included 7-result SERPs, Knowledge Graph expansion, updates to how "page quality" is calculated, and changes to how local results are determined.

Exact-Match Domain (EMD) Update — September 27, 2012

Google announced a change in the way it was handling exact-match domains (EMDs). This led to large-scale devaluation, reducing the presence of EMDs in the MozCast data set by over 10%. Official word is that this change impacted 0.6% of queries (by volume).

Panda #20 — September 27, 2012

Overlapping the EMD update, a fairly major Panda update (algo + data) rolled out, officially affecting 2.4% of queries. As the 3.X series was getting odd, industry sources opted to start naming Panda updates in order (this was the 20th).

Panda 3.9.2 (#19) — September 18, 2012

Google rolled out another Panda refresh, which appears to have been data-only. Ranking flux was moderate but not on par with a large-scale algorithm update.

Panda 3.9.1 (#18) — August 20, 2012

Google rolled out yet another Panda data update, but the impact seemed to be fairly small. Since the Panda 3.0 series ran out of numbers at 3.9, the new update was dubbed 3.9.1.

7-Result SERPs — August 14, 2012

Google made a significant change to the Top 10, limiting it to 7 results for many queries. Our research showed that this change rolled out over a couple of days, finally impacting about 18% of the keywords we tracked.

DMCA Penalty — August 10, 2012

Google announced that they would start penalizing sites with repeat copyright violations, probably via DMCA takedown requests. Timing was stated as "starting next week" (8/13?).

June/July 86-Pack — August 10, 2012

After a summer hiatus, the June and July Search Quality Highlights were rolled out in one mega-post. Major updates included Panda data and algorithm refreshes, an improved rank-ordering function (?), a ranking boost for "trusted sources", and changes to site clustering.

Panda 3.9 (#17) — July 24, 2012

A month after Panda 3.8, Google rolled out a new Panda update. Rankings fluctuated for 5-6 days, although no single day was high enough to stand out. Google claimed ~1% of queries were impacted.

Link Warnings — July 19, 2012

In a repeat of March/April, Google sent out a large number of unnatural link warnings via Google Webmaster Tools. In a complete turn-around, they then announced that these new warnings may not actually represent a serious problem.

Panda 3.8 (#16) — June 25, 2012

Google rolled out another Panda data refresh, but this appeared to be data only (no algorithm changes) and had a much smaller impact than Panda 3.7.

Panda 3.7 (#15) — June 8, 2012

Google rolled out yet another Panda data update, claiming that less than 1% of queries were affect. Ranking fluctuation data suggested that the impact was substantially higher than previous Panda updates (3.5, 3.6).

May 39-Pack — June 7, 2012

Google released their monthly Search Highlights, with 39 updates in May. Major changes included Penguin improvements, better link-scheme detection, changes to title/snippet rewriting, and updates to Google News.

Penguin 1.1 (#2) — May 25, 2012

Google rolled out its first targeted data update after the "Penguin" algorithm update. This confirmed that Penguin data was being processed outside of the main search index, much like Panda data.