Search engines are responsible for indexing sites based on the keywords people use as search terms. They can automatically come up with website listings through the use of spiders that “crawl” into several web pages and index the information they contain. Spiders visit websites on a regular basis to check for changes or updates that may affect the database of a search engine.
Here’s a quick look at how a search engine works to index web pages and produce relevant search results in minutes.

Search engines play a huge role in the success of online businesses. Image courtesy of Flickr.
How Do Search Engines Work?
A search engine makes use of very detailed methodologies and processes that requires constant updates. While different types of search engines are already available online, they use the same steps when retrieving search results. When people type queries into a search engine, it automatically sorts through the information in its database to find web pages that match this query. These results are then ranked in terms of relevancy.
A complete list of search engines usually includes both crawler-based software programs and human-powered directories. While the former creates search listings automatically, the latter greatly depends on humans for compiling listings. In a human-powered directory, editors are in charge of reviewing descriptions of page content and filing them under related categories. It then answers queries based on the brief descriptions that authors submitted.
List of Search Engines
If you want to reach your target audience and keep your website accessible to potential clients, you’ll need to be familiar with the growing list of top search tools. Google, which is considered as the most-visited website worldwide, is one of today’s most popular search engines. Its network of sites gets over 65% of all the search queries in the United States. In 2009, Yahoo was also declared the second biggest crawler-based engine on the Internet.
Bing, a search tool launched by Microsoft in 2009, has already tied up with Yahoo by delivering its results. It is closely followed by Ask, a tool that aims to help users answer questions in their natural language. While Ask is still cited in the official list of search engines, it has already stopped crawling and indexing its own pages because of its recent decision to outsource that to Bing or Google.
Search engine databases continue to evolve, so marketers are always on the lookout for updated search models. With a better understanding of how a search engine works, you can easily publish content according to their guidelines and drive more traffic to your website.



