Patent analysis: how search engines deal with inbound links

This month, Yahoo was granted a patent that describes how link texts may be used to increase the relevancy ranking of a web page. Although the patent was filed in 2002, it provides interesting details about how search engines can use link texts.

Why are link texts important?

All major search engines pay close attention to the text that is used in links pointing to web pages. A web page might be considered more relevant to a search term if the search term not only appears on the web page but is also used in the text of the link that points to the page.

Web pages can even get high rankings for a search term if they don't contain that search term. It's enough that many websites link to the page with the search term in the link text. This has been demonstrated with several Google bombs.

How do search engines treat link texts?

While it is clear that link texts are very important for search engines, it's not clear how much weight search engines assign to a link text when they index a page. Are some link texts more important than others?

The patent indicates that link texts are broken into parts, called tokens:

Once an anchortext phrase is identified, it is converted into a set of tokens. For example, page 306 contains the phrase "best Louis Armstrong site" pointing to page 200. The tokenization produces the following tokens:

* Trumpet"Best Louis Armstrong site"
* "Louis Armstrong"
* "Louis"
* "Armstrong"
* "Best"
* "Best Louis"
* "Best Armstrong"
* "Best site"

The search engine algorithm calculates a weight for each of these tokens. If the weight exceeds a threshold, the linked web page may be indexed under that token.

How do search engines calculate the weight?

Search engines consider how often each word or word sequence can be found in link texts pointing to a particular page and how often the token appears in the index.

Search engines might assign the greatest importance to words that appear the least frequently in the search index. The reason for that is that those words are often more specifically related to the searched topic.

In addition, a token that appears very often in link texts that point to a special web page could be given higher weight. Tokens that appear very frequently in the search index ("site" or "best") might be discounted because they are not relevant to the special topic.

What does this mean to your website?

All major search engines use this method to rank web pages. If you want to get high rankings on search engines, you must make sure that your web site has good inbound links with the right link texts.

Optimized web pages are important to tell search engines that your website is relevant to your keywords. Good inbound links with the right link texts will enforce the relevancy of your pages for your keywords.

What you have to do to get high rankings on Yahoo and Google

1. Optimize your web pages for your keywords. While it is possible to get high rankings for a keyword if you have enough inbound links that contain that keyword, it is much easier to get high rankings for a special keyword if your web page has been optimized for that keyword.

2. Try to get as many inbound links as possible. The links to your website should use your targeted keywords in the link text. Do not use the exactly same text over and over. Vary your link texts and use related but different expressions for the links to your site.


The Yahoo patent confirms the methods that modern search engines use to rank web pages. If you follow the tips and tricks above, your website will get the best possible rankings on Yahoo, Google and other major search engines.

For more visit: facts.axandra.com

Latent Semantic Indexing(LSI) and SEO

Indexing has always been considered a highly targeted science. Enter a search query into Google search and the pages that are displayed are generally optimized towards that exact word or term. However, in their continual battle to server the most relevant but most natural pages with genuinely useful information Google has injected latent semantic indexing (LSI) into its algorithms.

What Is LSI?

LSI is a unique indexing method that potentially takes Google search one step closer to becoming human in its way of thinking. If we were to manually search through web pages to find information related to a given search term we would be likely to generate our own results based on the theme of the site, rather than whether a word exists or doesn’t exist on the page.

Why Search Engines Might Adopt Latent Semantic Indexing

The extremely rigid form of “keyword indexing” also meant that black hat SEO techniques were easier to implement. Search engines could be manipulated into ranking a site highly by using set formula. Originally, cramming a page with a particular keyword or set of keywords meant a site would rank highly for that search term. The proceeding set of algorithms ensured that your link profile played more of an important part than your keyword density. Reciprocal linking soon followed once again making it possible to manipulate the search engine spiders by exchanging links with tens, hundreds, or thousands of websites.

Reciprocal linking was soon beaten as Google and to a lesser extent Yahoo and MSN gave less credence to a reciprocal link as they did to a one-way inbound link. Latent Semantic Indexing is another, particularly powerful, method to try and make their result pages appear more natural with natural pages filled with natural content.

The Effects

The introduction of LSI has seen some dramatic changes in the search engine result pages already. Sites that had previously performed well because of an impressive link profile based on a single keyword have found their pages slip in the rankings. Other pages with a more diverse portfolio of inbound links are taking the lead with search terms for which they had not previously performed.

SEO is far from dead because of LSI, in fact if anything, it has probably increased the need for professional white-hat SEO on your website. The field of SEO, though, has almost certainly changed. Website content copywriting for Google’s benefit is not merely made up of keyword density and keyword placement as it once was and link-building techniques will need to change to incorporate LSI algorithms but it can be done.

Writing Content For LSI

If optimizing solely for Google then a web page can, theoretically, be naturally written and naturally worded. When we write we instinctively include the appropriate keyword in our text. In order to avoid repetition (or keyword optimization, as it was once called) we would often alter some instances of these keywords for other words with the same or very similar meaning. We naturally include the plural or singular form of a keyword as well as different tenses and a number of different stems of that keyword. In the eyes of LSI algorithms this is all good news.

Looking At Your Link Profile

A link profile should no longer consist of thousands of links with the same anchor text (that of your primary keyword). There’s no reason to panic if you already have this kind of profile. Instead you should look at relevant and similar terms and improve your link profile by gaining links using these as your anchor text.

What It Offers Web Searchers

From the point of view of web searchers, LSI offers some distinct advantages over its earlier form of indexing. For example, LSI recognizes that the word “engine” in “search engine optimization” is not related to searches for terms like “steam engine” or “locomotive engine” and is instead related to Internet marketing topics. In theory, LSI results give a much more accurate page of results as well as providing a broader range of pages still geared towards a particular topic.

Where Google Leads, Others Generally Follow

It is widely acknowledged that Google is the search engine at the forefront of latent semantic indexing. On the whole they try to generate results pages that are literally filled with genuine, useful results and LSI certainly provides another string in their bow. Yahoo and MSN, for now, seem more than happy to go along with keyword specific indexing although Yahoo are known to look at singular and plural keyword variations as well as keyword stemming when judging keyword density.

The Effect On Your Website

How it affects the individual Webmaster is dependent on how they go about promoting their site already. If the pages are filled with natural content including keywords and keyword alternatives, and the link profile is similarly diversified for a number of related keywords then the fact is it won’t change very much. However, if all of your efforts have been concentrated, either on-page or off-page, with a single keyword then it’s time to readdress the balance.

source: http://promotingwebs.wordpress.com/2007/12/20/latent-semantic-indexing-lsi-and-seo/

How to choose effective SEO services?

Any person familiar with the internet and using it in day today life is aware of the effects of search engine optimization to an extent. The companies that are serious in marketing a product or service online can not neglect the importance of Search Engine Optimization or SEO services.
As the world is shrinking and is becoming a small place to live in, the consumers have an option to use products and services offered by the manufactures of other country. This has led to a situation where more number of consumers looks for the product and services on the internet.
More and more companies are using search engine optimization, as it is among the most effective tool online that can help them to boost their sales to higher extent. The common opinion of experts states that SEO will soon become a matter of survival for every company if practiced in the right manner.

SEO is an effective process by which superior amount traffic to your website can be generated by the way of improving your company’s ranking on the various search engines. The accurate return on investment of the SEO services is actually incalculable because SEO is very time-dependent. The methods of SEO are countless and SEO experts have the depth knowledge on the methods that would improve the search engine ranking as each website requires different work to receive triumphant ranking. These experts are able to help you to receive a superior sum of target web traffic at your site.
If you are left with the question as to how to choose SEO services that are effective, here is an answer.
• While choosing the company providing SEO services ensure that the experts who will work on your website have the expertise in using the latest tools that can help you to secure good ranking in all the major search engines not just one of them. As the internet world is advancing, so are the algorithms of the Search engine are getting more and more complex continually.
• Further, proper research work is pivotal for the receiving the desired results and you don't need any SEO company, who will conduct the same work as they have done for others
• To avail the desired rankings, it takes somewhere few weeks to a few months for search engines to index your site and for the change of ranking to take affect. So, if any optimizer who promise you to provide with immediate results, he is surely making false promises or else will use unethical ways to promote your website.
• Remember, unethical practices may help to achieve results in the shorter time frame however will definitely harm your website in the longer run, so think what you would want to attain.
The diverse actions and a set of proven activities that is correct and qualitative will be most effective and will take your website on the road of the success. Keeping this is mind you can select the SEO services that are impacting.