Welcome to My Presentation

Submitted by,Md.Kamrul Islam Shuvo

14-01-06-190Ahsanullah University Of Science & Technology

Search Engine

A search engine is a web-based tool that enables users to locate information on the World Wide Web.

Features of Search Engine

It moves around the Web collecting Web Pages to include in its catalog or database.

It searches when an user requests information from a search engine; not the entire Web.

Each search engine has its own catalog or database of collected WebPages.

How Do Search Engine Work? Every search engine uses different

complex mathematical formulas to generate search results.

Search engine algorithms take the key elements of a web page, including the page title, content and keyword density, and come up with a ranking for where to place the results on the pages.

Search engine’s algorithm is unique.

Types of search engines:

. Specialty search engines

. Hybrid search engines

. Meta search engines

Specialty Search Engines This is a search engine that is focused on

one or two particular specialty search engines or categories, for example Yell.com, Yell uses categorise to make It easier to find the information that is placed into the site.

Examples: -Askjeeves -Medhunt

Hybrid Search Engines A hybrid search engine (HSE) is a

type of computer search engine that uses different types of data with or without ontologies to produce the algorithmically generated results based on web crawling.

Exmples:-Yahoo.com-Google.com

Meta Search engine A meta search engine (or aggregator) is a

search tool that uses another search engine's data to produce their own results from the Internet. Meta search engines take input from a user and simultaneously send out queries to third party search engines for results.

Examples:-Metacrawler-Dogpile

How Are These Tools Different

. A search engine type is determined by how the information contained in its catalog or database is collected

• The sites in the catalog or database of a search directory or index are compiled by humans; not an automated software program

A web search engine is a software system that is designed to search for information on the World Wide Web. The search results are generally presented in a line of results often referred to as search engine results pages (SERPs).