What is Search Engine?
A search engine is a web-based tool that helps users to get information on the World Wide Web. It helps user to search the internet for information against the keyword. When a user enters a keyword or key phrase into a search engine, a search engine results page is returned, ranking the found pages in order of their relevance.
Actually, search engine helps user to get the real information and that’s why it open changes their algorithms. They aim to understand how people search and give the best answer to its query.
Let’s have a look world’s best 10 Search Engine
How do search engines work?
Search engines use a program, often referred to as spiders, robots or crawlers, Indexing, to search the internet. These programs are used by search engines to build an index of the internet. However, most search engines will provide tips on how to improve your page ranking, the exact algorithms used are well guarded and change frequently to avoid misuse and Search Engine Optimization is a process of getting traffic from organic search results on search engines. Let’s have a look step by step how it works
Crawling is the first step for any search engine, it where it all begins – the acquisition of data about a website. This involves scanning the site and getting a complete list of everything on there – the page title, images, keywords it contains, and any other pages it links to – at a bare minimum. Modern crawlers may cache a copy of the whole page, as well as look for some additional information such as the page layout, where the advertising units are, where the links are on the page.
After crawling, then – indexing is the process of taking all of that data you have from a crawl, and placing it in a big database. Imagine trying to a make a list of all the books you own, their author and the number of pages. Going through each book is the crawl and writing the list is the index. But now imagine it’s not just a room full of books, but every library in the world. That’s pretty much a small-scale version of what Google does.
Last step is what you see – you type in a search query, and the search engine attempts to display the most relevant documents it finds that match your query. This is complicated step, but also the most relevant to you or I, as web developers and users. It is the area in which search engines differentiate themselves (though, there was some evidence that Bing was actually copying some Google results). Some work with keywords, some allow you to ask a question, and some include advanced features like keyword proximity or filtering by age of content.