It's helpful to think of the web as a massive library, but without a file system. Google's index is a library's version of a catalog. Other search engines, such as Bing and Yahoo, have their own way of indexing web pages that is very similar list of algeria whatsapp phone numbers to Google's.
The way Google builds its index is by using what are known as 'spiders' (hence the concept of 'network') - web crawling robots that discover publicly available web pages. These spiders follow links from those pages to more pages, sending the data back to Google's servers and building its index.
When you type a query into the Google search box, (for example 'plumber Alicante') Google's software searches the index to find all the pages that mention those search terms. This can result in hundreds of thousands of results, if not more.
The next step is for Google to filter those results and rank them, which it does by applying certain parameters. Think of this as Google asking questions about the results, such as: how many times a page contains the requested keywords; do the words appear in the title or URL; does the page contain synonyms for the words; is it a quality website?
The other factor in determining where a result appears on Google is its 'page rank', which is a formula invented by Google that ranks the importance of a web page based on how many external links point to it, and in turn, how important those links are.
All of this comes together to produce a list of results, sorted by relevance, delivered about half a second after you type in your search.
