
Search engine optimization (SEO) is a set of methods aimed at improving the ranking of a website in search engine listings. The term also refers to an industry of consultants who carry out optimization projects on behalf of clients' sites. Practitioners may use "white hat SEO" (methods generally approved by search engines, such as building content and improving site quality), or "black hat SEO" (tricks such as cloaking and spamdexing). White hatters charge that black hat methods are an attempt to manipulate search rankings unfairly. Black hatters counter that all SEO is an attempt to manipulate rankings, and that the particular methods one uses to rank well are irrelevant.
Search engines display different kinds of listings in the search engine results pages (SERPs), including: pay-per-click advertisements, paid inclusion listings, and organic search results. SEO is primarily concerned with advancing the goals of a web site by improving the number and position of its organic search results for a wide variety of relevant keywords. SEO strategies can increase both the number and quality of visitors, where quality means visitors who complete the action hoped for by the site owner (e.g. purchase, sign up, learn something).
For competitive, high-volume search terms, the cost of pay per click advertising can be substantial. Ranking well in the organic search results can provide the same targeted traffic at a potentially lower cost. Site owners may choose to optimize their sites for organic search, if the cost of optimization is less than the cost of advertising.
Not all sites have identical goals for search optimization. Some sites are seeking any and all traffic, and may be optimized to rank highly for common search phrase. A broad search optimization strategy can work for a site that has broad interest, such as a periodical, a directory, or site that displays advertising with a CPM revenue model. In contrast, many businesses try to optimize their sites for large numbers of highly specific keywords that indicate readiness to buy. Overly broad search optimization can hinder marketing strategy by generating a large volume of low-quality inquiries that cost money to handle, yet result in little business. Focusing on desirable traffic generates better quality sales leads, allowing the sales force to close more business.
The relationship between SEO and the search engines
Search engine operators became interested in the SEO community in the late 1990s. A number of high profile SEO community leaders established contractual relationships with search engines for advertising and consulting purposes. These early contacts led to an amelioration of some hostile feelings between the search optimization and search engineering communities.
In early 2000, search engines and SEO firms attempted to establish an unofficial "truce." There are several tiers of SEO firms, and the more reputable companies employ content-based optimizations which meet with the search engines' (reluctant) approval. These techniques include improvements to site navigation and copywriting, designed to make websites more intelligible to search engine algorithms.
Some search engines have also reached out to the SEO industry, and are frequent sponsors and guests at SEO conferences and seminars. In fact, with the advent of paid inclusion, some search engines now have a vested interest in the health of the optimization community.
Getting into search engines' listings
New sites do not need to be "submitted" to search engines to be listed. A simple link from an established site will get the search engines to visit the new site and spider its contents. It is rarely more than a few days from the acquisition of the link to all the main search engine spiders visiting and indexing the new site.
Once the search engine has found the new site, it will generally visit and index all the pages on the site, as long as all the pages are linked to with standard <a href> hyperlinks. Pages which are accessible only through Flash or Javascript links may not be findable by the spiders.
Webmasters can instruct spiders to not index certain files or directories through the standard robots.txt file in the root directory of the domain. Standard practice requires a search engine to check this file upon visiting the domain. The web developer can use this feature to prevent pages such as shopping carts or other dynamic, user-specific content from appearing in search engine results.
For those search engines who have their own paid submission (like Yahoo), it may save some time to pay a nominal fee for submission.
White hat methods
So-called "white hat" methods of SEO involve following the search engines' guidelines as to what is and what isn't acceptable. Their advice generally is to create content for the user, not the search engines; to make that content easily accessible to their spiders; and to not try to game their system. Often webmasters make critical mistakes when designing or setting up their web sites, inadvertently "poisoning" them so that they will not rank well. White hat SEO attempts to discover and correct mistakes, such as machine-unreadable menus, broken links, temporary redirects, or a generally poor navigation structure that places pages too many clicks from the home page.
Because search engines are text-centric, many of the same methods that are useful for web accessibility are also advantageous for SEO. Methods are available for optimizing graphical content, including ALT attributes, and adding a text caption. Even Flash animations can be optimized by using an OBJECT element that contains equivalent HTML content [3].
Some methods considered proper by the search engines:
- Using a short and relevant title to name each page.
- Editing web pages to replace vague wording with specific terminology that is relevant to the subject of the page.
- Increasing the amount of original content on a site.
- Using a reasonably-sized, accurate description meta tag without excessive use of keywords, exclamation marks or off topic terms.
- Ensuring that all pages are accessible via regular links, and not only via Java, Javascript or Macromedia Flash applications; this can be done through the use of a page listing all the contents of the site (a Site map)
- Developing links via natural methods: Google doesn't elaborate on this somewhat vague guideline. Dropping an email to a fellow webmaster telling him about a great article you've just posted, and requesting a link, is most likely acceptable.
- Participating in a web ring with other web sites as long as the other websites are independent, share the same topic, and are of comparable quality.
Black hat methods
Spamdexing is the promotion of irrelevant, chiefly commercial, pages through deceptive techniques and the abuse of the search algorithms. Many search engine administrators consider any form of search engine optimization used to improve a website's page rank as spamdexing. However, over time a widespread consensus has developed in the industry as to what are and are not acceptable means of boosting one's search engine placement and resultant traffic.
As search engines operate in a highly automated way it is often possible for webmasters to use methods and tactics not approved by search engines to gain better ranking. These methods often go unnoticed unless an employee from the search engine manually visits the site and notices the activity, or a change in ranking algorithm causes the site to lose the advantage thus gained. Sometimes a company will employ an SEO consultant to evaluate competitor's sites, and report "unethical" optimization methods to the search engines.
Spamdexing often gets confused with legitimate search engine optimization techniques, which do not involve deceit. Spamming involves getting web sites more exposure than they deserve for their keywords, leading to unsatisfactory search results. Optimization involves getting web sites the rank they deserve on the most targeted keywords, leading to satisfactory search experiences.
When discovered, search engines may take action against those found to be using unethical SEO methods. In February 2006, Google removed both BMW Germany and Ricoh Germany for use of these practices.[4]
Legal issues
In 2002, search engine manipulator SearchKing filed suit in an Oklahoma court against the search engine Google. SearchKing's claim was that Google's tactics to prevent spamdexing constituted an unfair business practice. This may be compared to lawsuits which email spammers have filed against spam-fighters, as in various cases against MAPS and other DNSBLs. In January of 2003, the court pronounced a summary judgment in Google's favor. [5]
High quality web sites typically rank well
A webmaster who wants to maximize the value of a web site can read the guidelines published by the search engines, as well as the coding guidelines published by the World Wide Web Consortium. If the guidelines are followed, and the site presents frequently updated, useful, original content, and a few meaningful, useful inbound links are established, it is usually possible to obtain a significant amount of organic search traffic.
When a site has useful content, other webmasters will naturally place links to the site, increasing its PageRank and flow of visitors. When visitors discover a useful web site, they tend to refer other visitors by emailing or instant messaging links.
As a result, SEO practices that improve web site quality are likely to outlive short term practices that simply seek to manipulate search rankings. The top SEOs recommend targeting the same thing that search engines seek to promote: relevant, useful content for their users.
References
- Company Overview. Google. URL accessed on May 26, 2005.
- Editorial Guidelines for Ask.com. Ask Jeeves. URL accessed on May 26, 2005.
- Brin, Sergey; Page, Lawrence (?). "The Anatomy of a Large-Scale Hypertextual Web Search Engine"
- Our Search: Google Technology. Google. URL accessed on June 11, 2005.
- Google Patent Application List. History. URL accessed on October 10, 2005.
- Kent, Peter (2004). Search Engine Optimization For Dummies, Wiley Publishing Inc.. ISBN 0-7645-6758-6.
Links
- Google's Guidelines on SEO's
- Google's Guidelines on Site Design
- MSN Search Guidelines for successful indexing
- Yahoo! Search Content Quality Guidelines
This guide is licensed under the GNU Free Documentation License. It uses material from the Wikipedia.
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