How Does a Search Engine Works: Types of Search Engines, Top 5 Search Engines

What is a Search Engine?

A search engine can be any site that has indexed web pages, but only those with specific characteristics are known as search engines. Search engines try to retrieve information from the web and rank them according to relevance. A search engine is a computer system that is designed to search for information on the World Wide Web.

A search engine is a software system that provides access to an index of information. It makes it easier for someone to find and retrieve web pages, images, videos, or other forms of data by using keywords as "filters." 

Search engines are designed to crawl the internet and index all content found. They do this by following links from one web page to another.

Why Search is important?

A search engine is important in our day-to-day lives. It is an indispensable tool to navigate the world’s information. It has become an important part of our culture and influences the way people interact with society, their social life, and their jobs.

Search engines provide a convenient way to find relevant information that you are looking for. They are also a source of data with which we can generate statistics on many different topics of interest including employment, education, health care, housing, and transportation.

Search engine success is a major factor in determining the success of a company. A company without a search engine optimized website will not be able to reach many potential customers and will have less chance of succeeding in business. Search engines are efficient marketing tools that are necessary for any company to grow and thrive.

How does a Search Engine Work?

A search engine is a website that enables the user to input search queries and receives web pages in response. The web pages are ranked based on the relevance of their content to the user's query.

A search engine contains pages that contain links to websites, and some are "crawlers" that can navigate through a site's files in order to index them.

Search engines are designed to make it easier for you to find the right content. You enter a keyword and the search engine will show you a list of relevant pages that match your query. But how does this work?

What is search engine crawling?

A search engine crawls the internet looking for all of these pages and indexes them in its database so when someone searches for something they can find it. The goal is to make sure that all relevant content can be found.

Search engines aim to produce relevant results matching the query criteria entered by users and return them in order of relevancy. 

The best way to rank these results is by using algorithms such as PageRank which assigns importance scores to individual pages based on how many other pages link to it; this method has proved successful but can be manipulated if spammers create large numbers of links.

What is a search engine index?

A search engine index is the representation of the amount of information and content that a search engine has in its database.

A search engine index is an internal representation of a search engine's database. It's a snapshot of all the pages on the internet that are relevant to a certain query. This means that each time you enter a query, you will see different results because they depend on what was in the index at that time.

What is Search Engine Ranking(SEO)?

Search engine ranking is the process of optimizing a website in such a way that it appears at the top of a search engine's results page.

A high ranking on Google can be achieved through various techniques but they all generally fall into two categories: on-page optimization and off-page optimization.

Some ways that you can ensure that your site has a high rank is to optimize your site and make sure that all of the codings are correct. You should also be sure to have keywords on every page of your website and blogs, use meta tags, and make sure to include keywords in the title tags.

You should also monitor how well you are doing with search engine rankings on an ongoing basis so that you know where you need to improve or change things on your website for better results.

So These are some popular types of search engines

1. Crawler based search engines

Crawlers are the basic tools of crawler-based search engines. They are designed to scan page content and then extract information about the page and its surrounding links.

Crawler-based search engines use two types of crawlers: downloaders or scrapers. Downloaders crawl a website page by page and extract linked content, while scrapers use screen-scraping to gather information about a webpage, typically by downloading the entire site as an archive file.

2. Hybrid search engines

A hybrid engine combines aspects of a general search engine with those of a specialist search engine. This is achieved because the first performs an initial scan and then hands over the results to a second engine for a more detailed analysis.

3. Human-powered directories

A human-powered search engine is a service that provides a web crawler to indexing and cataloging internet content in the same way as other search engines, but instead of using sophisticated algorithmic techniques to rank pages or do web page analysis, its index of pages is maintained by human editors.

This type of search engine emphasizes human intelligence.

The Top 5 Search Engines in 2021 are:

1. Google

2. Microsoft Bing

3. Yahoo

4. Yandex

5. DuckDuckGo

Market share of Search Engines Globally

image by Sarchengineoptimizationexpert.com

• Google has 89 percent of Market Share Globally

• Microsoft has 6 Percent Market Share Globally

• Yahoo has 4 Percent of Market Share Globally

• DuckDuckGo has Approx 1 percent market share Globally