A search engine is a software system designed to carry out web searches. They search the World Wide Web in a systematic way for particular information specified in a textual web search query. The search results are generally presented in a line of results, often referred to as search engine results pages. The information may be a mix of links to web pages, images, videos, infographics, articles, research papers, and other types of files.

Google is a globally recognized search engine and an industry giant. Even if it’s the biggest and most well-known, it doesn’t mean it’s your only choice.

Microsoft’s Bing is the second largest search engine after Google. Yahoo has been around for even longer than Google, and while some see it as outdated, it’s still the third most popular search engine worldwide.

More Info: en.wikipedia.org