Search Engines are internet or web based software that take in keywords as input and return web pages as output matching various parameters related to the keyword (for example, Google).
There could be other search engines that find fares, currencies, cities, people, products etc. But the ones most popular today are the ones that provides sites or pages on sites against a particular keyword.
These search engines maintain huge databases where they store copies of billions of web pages. Search engines have special programs that roam throught he web and index pages after pages every day. The indexed pages are revisited to make a copy of the updated versions of the pages too.
Some of the popular search engines today are Google, Yahoo, Bing, etc. They are web pages where you type in a word or phrase, and it looks up internet pages for you.
In its simplest form - search engines scan the internet locating information in seconds, that you or someone else is searching for. Every time you do a search, it is the search engines that are scanning the internet to locate the most relevant information that you are looking for.
A search engine is like Google, or Yahoo, when you go on the internet and type what youre looking for you use a search engine.
There are two types of search engines 1. Hybrid search engines 2. Meta search engines
Spider-Based Search Engines. Directory-Based Search Engines. Link-Based Search Engines.
Horizontal search engines are general-purpose search engines such as Google and Yahoo. Vertical search engines, meanwhile, are specialized by content such as Trulia, Mocavo and Yelp.
name five search engines
It is where you can search anything you wanted to. Yahoo ang Google are example of search engines.
you dont, thats why they are crawler search engines.
Discovery
Crawler based search engines such as google .com HUman powered directories and Hybrid search engines
Yes there is search engines for assets. Just google it on google and you can find some many search engines for assets.
Generally speaking, meta search engines perform searches using a conglomeration of other search engines. Metasearch engines enable users to enter search criteria once and access several search engines simultaneously. Metasearch engines operate on the premise that the Web is too large for any one search engine to index it all and that more comprehensive search results can be obtained by combining the results from several search engines. This also may save the user from having to use multiple search engines separately.
Google, Yahoo, Bing are biggest search engines. There are some more search engines like Astalavista, Lycos, Ask, etc.
Some common search engines include:GoogleBingYahoo!AskAOL Search