Search Engine

"Search engine" is actually a general term for any internet portal that has World Wide Web search capabilities. Perhaps you use Google to search for information on the 'net. Google is a search engine, but more specifically, Google is a crawler-based search engine. Yahoo and Open Directory are human-powered directories. Some search engines, such as MSN, are a combination of the two.

The Different Types of Search Engines

• Crawler-based search engines -search engines use a form of software program called spiders or crawlers("spiders" or "robots") to find information on the Internet and store it for search results in giant databases or indexes.

• Directory-based search engines-(Human-powered search engines)Open Directory is one such directory and submission depends on a human to actually submit a website.

• Link -based search engines-a search engine provides results based on hypertext links between sites.

Search Engine Optimization

What is Search Engine Optimization?

SEO is an acronym for “Search Engine Optimization” or “Search Engine Optimizer”.It is a set of methodologies aimed at improving the visibility of a website in search engine listings.
Search Engine Optimizer is the terms adopted by an industry of consultants who carry out optimization projects on behalf of clients, and by employees who perform SEO services in-house.SEO may offer SEO as a stand-alone service or as a part of a broader marketing campaign.

SEO began in the mid-1990s, as the first search engines were cataloging the early Web. Many site owners quickly learned to appreciate the value of a new listing in a search engine, as they observed sharp spikes in traffic to their sites.Site owners soon began submitting their site URLs to the engines on a regular basis, and began modifying their site to accommodate the needs of search engine spiders, the software programs sent out to explore the Web. Danny Sullivan who invented the search engine optimization by a spam message in Usenet(July 26, 1997).Larry Page and Sergey Brin developed “backrub”, a search engine that relied on a mathematical algorithm to rate the prominence of web pages. By 2007, search engines had incorporated a wide range of undisclosed factors in their ranking algorithms to reduce the impact of link manipulation.