04/11 – Panda 2.0                                 09/28 – Panda 2.5

05/09 – Panda 2.1                                 10/03 – Panda Flux

06/21 – Panda 2.2                                 10/13 – Panda Flux

07/23 – Panda 2.3                                 11/18 – Panda 3.1

Panda 1.0 impacted an estimated 12% of queries

新版SEO搜索引擎优化入门指南丰富了内容，有了更多的图文例子，对词汇定义也更加完善，而Google机器人也强势回归。Google SEO 入门教程涵盖 了网站站长需要考虑优化的诸多方面。这些方面（比如改善标题和描述元标签，URL结构，网站导航，网站内容的建设，锚文本……等等）适用于各种不同经验层 次的网站站长和不同规模和类型的网站。

您可以到 http://www.google.com/support/webmasters/bin/answer.py?hl=zh-Hans&answer=35291

下载完整 32 页的 PDF 文件（英文版、简体版、繁体版），打印下来作为有用的SEO入门参考资料。

This allows users to view a quick preview screenshot of every listed site in the search results page.  This feature comes after Google has introduced both the Instant and Google Places updates in an attempt to pack in as much information as possible into the home page.

I’m sure Instant Preview will impact site designs, as well as alter how businesses approach online search rankings once again.

Google says the update will be rolling out to 100% of users around the world over the next few days, including Australia. The company argues the new feature will make it easier and faster for users to find what they want.

With all the recent updates, I’m smelling a PR update too.

In summary:

•April 28th – May 3rd is when it happened
•Algorithmic change
•Impacts long tail searches more than head searches
•It is “deliberate” and will be sticking around
•Quality change
•No relation to Caffeine but Caffeine is “proceeding to pace”
•No human manipulation
•This is not temporary
•If you are impacted, assess your site for quality
Here is the detailed video from Google’s Matt Cutts:

You can report paid links that pass PageRank, blog spammers, guestbook spammers and etc from webmaster tool.

Here’s a shortcut link for it:

http://goo.gl/linkspam

Although Matt Cutts states Google works really hard from Competitor A hurting Competitor B from this “bad mouthing” action. It doesn’t guarantee Google won’t penalize a site because a bogus report from your competitor.

So be careful when you go out bad mouthing someone, because it might back fire you.

You can find Matt Cutts original post at: http://www.mattcutts.com/blog/calling-for-link-spam-reports

Example: “internet marketing”

2. Exclude Words:
Lets say you want to search for content about internet marketing, but you want to exclude any results that contain the term advertising. To do this, simply use the “-” sign in front of the word you want to exclude.

Example Search: internet marketing -advertising

3. Site Specific Search:
Often, you want to search a specific website for content that matches a certain phrase. Even if the site doesn’t support a built-in search feature, you can use Google to search the site for your term. Simply use the “site:somesite.com” modifier.

Example: “internet marketing” site:www.smallbusinesshub.com

4. Similar Words and Synonyms:
Let’s say you are want to include a word in your search, but want to include results that contain similar words or synonyms. To do this, use the “~” in front of the word.

Example: “internet marketing” ~professional

5. Specific Document Types:
If you’re looking to find results that are of a specific type, you can use the modifier “filetype:”. For example, you might want to find only PowerPoint presentations related to internet marketing.

Example: “internet marketing” filetype:ppt

6. This OR That:
By default, when you do a search, Google will include all the terms specified in the search. If you are looking for any one of one or more terms to match, then you can use the OR operator. (Note: The OR has to be capitalized).

Example: internet marketing OR advertising

7. Phone Listing:
Let’s say someone calls you on your mobile number and you don’t know how it is. If all you have is a phone number, you can look it up on Google using the phonebook feature.

Example: phonebook:617-555-1212 (note: the provided number does not work – you’ll have to use a real number to get any results).

8. Area Code Lookup:
If all you need to do is to look-up the area code for a phone number, just enter the 3-digit area code and Google will tell you where it’s from.

Example: 617

9. Numeric Ranges:
This is a rarely used, but highly useful tip. Let’s say you want to find results that contain any of a range of numbers. You can do this by using the X..Y modifier (in case this is hard to read, what’s between the X and Y are two periods. This type of search is useful for years (as shown below), prices or anywhere where you want to provide a series of numbers.

Example: president 1940..1950

10. Stock (Ticker Symbol):
Just enter a valid ticker symbol as your search term and Google will give you the current financials and a quick thumb-nail chart for the stock.

Example: GOOG

11. Calculator:
The next time you need to do a quick calculation, instead of bringing up the Calculator applet, you can just type your expression in to Google.

Example: 48512 * 1.02

12. Word Definitions:
If you need to quickly look up the definition of a word or phrase, simply use the “define:” command.

Example: define:plethora

Hope this list of Google search tips will improve your search experience with Google in the future. If there are any of your favorite Google expert power tips that I did not mention here, please feel free to share them in the comments.

Have you seen possible Caffeine effects in use? Leave your comments here.

Back before the holidays, Google made it a point to assure everybody that Caffeine would not be rolled out (except for at one data center) until after the holidays were over – January at the earliest. The reason for this was that Google didn’t want to shake everything up during a key time for businesses (they didn’t want a repeat of the Florida update).

The company let everyone know about its intentions at PubCon in November. In fact, a few days ago, Google’s Matt Cutts posted a video running through his presentation from that event on his blog. It covers much more than just Caffeine, but if you missed it, you may want to consider watching it anyway (Caffeine discussion starts at about 22:10 in the video).

“It’s a re-write of our indexing infrastructure. It’s taking the old way that we used to index things that we’d crawled around the web, and we’re replacing that with new architecture that’s fresh and that had been written to be more scalable, more flexible, [with] the ability to attach different types of data, and in the process of indexing, the ability to do more documents for a more comprehensive version of the web, and the ability to do it faster,” Cutts says of Caffeine.

But enough background. Barry Schwartz at Search Engine Roundtable points to a WebmasterWorld forum thread where administrator Tedster claimed to have seen Caffeine in action at a number of IP addresses. He wrote:

I’m seeing the Caffeine data-set being served via this set of IP addresses: 64.233.169.147, 64.233.169.105, 64.233.169.103, 64.233.169.104, 64.233.169.99,64.233.169.106

It seems to take 5 IP addresses to build the complete SERP, where in the past it often took only 3.

Schwartz also pointed to another member’s post (Whitenight), who said:

Well, just tripled checked with offices/employees in Texas, Colorado, and Indiana. All 5 “control” keywords/sites showed live Caffeine.

That member’s latest post says that the Caffeine Dataset is also on http://66.102.7.99 and http://66.102.7.104.

We don’t know for sure if this is all really Caffeine in action though. Google hasn’t commented on it, and has not made any announcements regarding Caffeine since what Matt said above. Some people don’t believe this is Caffeine at all. As Schwartz notes, we’ll have to wait for Google to say something.

Still, January is almost over, and Google said it would wait until after the holidays, specifically mentioning the month of January. It’s about time for this to be rolling out to some extent. Speed has been emphasized a significant amount in Caffeine discussion, and Cutts told us that page speed would likely become a ranking factor. Regardless of whether or not you are witnessing Caffeine in action yet, rest assured that it will be here sooner or later, and any edge you can give yourself in the meantime is for the good of your own site’s performance. Speed will not only supposedly help you in search going forward, but it just makes for a better user experience.

Share your thoughts about Google’s Caffeine update.

24% Trust/Authority of the Host Domain

22% Link Popularity of the Specific Page

20% Anchor Text of External Links to the Page

15% On-Page Keyword Usage

7% Visitor/Traffic & Click-Through Data

6% Social Graph Metrics

5% Registration & Hosting Data