they get paid by the whole lot of advertisements they display when you search
Many of them have paid adverstisements on them. == ==
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.
There are primarily three types of search engines: traditional search engines, vertical search engines, and meta-search engines. Traditional search engines like Google and Bing index the entire web and return results based on algorithms. Vertical search engines focus on specific niches or industries, such as medical or academic searches. Meta-search engines aggregate results from multiple search engines to provide a broader range of information.
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.
There are several types of search engines, including general search engines like Google and Bing, which index the entire web. Vertical search engines focus on specific niches, such as health or travel, providing specialized results. Meta-search engines aggregate results from multiple search engines, while local search engines prioritize geographically relevant content. Additionally, there are image, video, and academic search engines tailored for specific media types or scholarly research.
All search engines are free to use, but if you are talking about a "free" search engine on which to list your website, then the answer is yes also. Getting your website listed on a website in the "organic areas" is free, but takes time and requires you to correctly optimize your website for search engines. However, if you want your website listed in the "paid search" areas of search engines then you will need to pay a fee (normally a per click fee that can be anywhere from $0.10 to several dollars per click).
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.
you dont, thats why they are crawler search engines.
Discovery