What is the Structure of Crawler-based Top Search Engines?
Published March 11, 2010 | 
The structure of top search engines is similar and consists of three main components, with the first is known as a Crawler or Spider, and it surfs the Web looking for changes such as pages that were recently created and any updates of already indexed pages. Spiders crawl through links on the Web, both inside the individual site and between websites, and if there is no site with a links to yours, the search engine spider will not visit your site unless you suggest the site yourself, which the majority top search engines allow.
The second component of crawler-based search engines is known as an Index, which gets the information gathered by search engine spiders. 
Think of the Index of crawler-based top search engines as a huge container that selectively concentrates the copies of all the pages found by spiders or crawlers that are identified and treated as relevant and worthy of being posted by top search engines, but even if crawlers or spiders visit your page, it doesn’t mean it will be indexed right away, and it could take for several weeks or months while waiting for you to resort to a “paid submission.”
The third top search engine’s component is Software, which scans the Index and then presents the consecutive list of the most relevant pages gathered on your search query. It is important to understand that every top search engine has its own algorithm, and the tuning of all search engine crawlers and spiders differs. If you decide to ultimately rank high at a top search engine, do not forget that the value will be given not by a person, but by a non-discerning search engine robot, which will not take into consideration and value the sophistication of the site design.
What are the Types of Top Search Engines?
Published March 10, 2010 | When we look at the world of the top search engines, it can be divided into Crawler-based, Human-powered, Hybrid, and Pay-per-performance search engines. Crawler-based or “traditional” utilize special software, and surf the Web to supplement their database. Search engine spiders scan parameters which are 
not visible to the human eye, and they don’t differentiate the amenities of design, but see only the code for images, which throws obstacles between it and your content. The most important data for search engine robots is the relevancy of your printed text, the frequency of your keywords and phrases in the contents of the page, especially at the beginning and the end of it, which should be emphasized. The top search engines of “traditional” kind are Google, Teoma, AllTheWeb, Alta Vista, and Hotbot.
Directories, which are also known as human-powered or edited search engines, do not look for websites to index them, but they rather prefer you take the action to suggest your site, and most of them have “Add URL” pages where you fill out the required information such as the website title, description, keywords, and email. You simply select the proper category for the website and then, in accordance of turn, it will be examined by human editors, leaving the decision of this editor only to accept or not to accept the site. So it is that human-powered search engines do not have their own algorithms to rank websites, they rank according to alphabetic sequence or Google Page Rank, and 
Directories are often used by top search engines as a source of new pages to scan for indexation, and finally, among the largest top search engines of human-edited nature there are Yahoo!, DMOZ, and Looksmart.
Hybrid Search engines utilize both types of listing, for example, MSN presents human-edited listings from Looksmart and crawler-based listings from its own Web crawler. Currently, some top search engines also resort to opposite listings such as Google and Yahoo, but it only takes a small part of the whole process, and they are still leading their classes. Also, there are meta-search engines, which work to combine the results from the number of other top search engines at the same time and present the results, and among this kind of search engines is MetaCrawler and Dogpile, for example, MetaCrawler compiles the results of seven search engines including AltaVista and Lycos.
In Pay-per-performance search engines, you pay for your site to be listed, re-spidered, and top-ranked according to keywords you both choose and bid on. It is important to note that there is not a big amount of sites focused only on paid inclusions, with the most prominent being Overture, and in addition you can find some additional paid services provided by other top search engines, but don’t feel obligated to use them.
What is a Search Engine?
Published March 9, 2010 | Before we familiarize ourselves with any search engine, let’s answer the important question, what is a search engine? A search engine is simply complex programs and algorithms that define the most relevant information in the Web and delivers it to the consumer based on their search request of definite keywords or phrases, but we must also understand that the nature of the most popular search engines is quite complex and constantly improving.
Everyone that spends any length of time exploring the Web eventually turns to the search engines for help with information retrieval, and in reality, search engines are the only method by which we find specific websites without knowing its definite web address. Since there are several search engines, it’s a natural decision we all make, that to obtain the most relevant information available, everyone uses only the top search engines they have become the most comfortable with using, and that deliver the most relevant and best results.
As a matter of fact, some search engines deliver much more functionality than just identifying the web pages in the Web that contains words from your search request. If we look closely at Google, it’s carefully designed functionality can be used for a much wider range of purposes including identification of all sites linked to a given site, lookup and retrieval of definitions of technical terms, Internet shopping, and the evaluation of mathematical expressions and much more.
What is Search Engine Optimization?
Published February 24, 2010 | Search engine optimization is really relatively simple; it is a number and type of techniques used to increase a webpage’s attractiveness to search engines and thus benefit from high listings via changes to a site to make it more search engine compatible, and more relevant compared to other web pages.
It is common knowledge that search engines are both complicated and protected systems, and search engine optimization has become an important science.
Search Engine Optimization
Search Engine Optimization helps you to get traffic to your site for free, and it is important since you can obtain the same or even larger number of visitors by optimization alone without having to pay for advertising. It is widely known that many Web surfers knowingly tend to ignore paid (sponsored) results, which are displayed by the search engines, but if you site is shown on the top of the first page of SE results for the query, your chances are greater to turn those surfers into visitors.
Search Engine Optimization techniques increase your page relevance for the engines and it is critically vital for every site owner to keep an eye on how his website ranks in the top search engines and directories. Remember that your company’s site prestige and reputation can be seriously damaged if its rankings are not in the top ten for the related keywords, even more so if rankings in search engines are lower than top thirty. If this is the case, you might as well be invisible on the Web, and according to researchers at Forrester Research, Inc., users hardly ever go beyond the top thirty search engine rankings for a single search, and it is estimated that the top thirty search engine results can receive over ninety percent of search traffic. The main point to remember is the higher your page is in the results, the greater its chance to attract higher traffic as a result.