A search engine is a web site that collects and organizes content from all over the internet. Those wishing to locate something would enter a query about what they'd like to find and the engine provides links to content that matches what they want.Search engines help us to find what we want in easy way.
As regards real estate, millions of searches are done each day on multiple search engines for search queries like "Atlanta real estate". or "atlanta ga real estate". The search engine returns results for real estate related sites and content for the Atlanta, GA area in case. The sites are ranked by highly secret and complex formulas. These formulas are also changes frequently by the engines.
Though there are many who attempt to manipulate their sites to get higher placement in results, its generally best to provide highly relevant real estate and area content and make it very useful for your site visitors. As all the engines are striving to be the most popular based on results that are closest to what the searcher is looking for, it can only be a good strategy to provide that relevant content.
There have some examples of search engines that we always use for search what we want in internet.