Thanks for stopping by this Wonder of the Day®, Steven! Those are both awesome questions you ask! Part of the fun of visiting Wonderopolis is that Wonder Friends (like you!) get to learn a little bit about something they WONDER about (like how an engine works), and then take that little bit of knowledge and go on a personal quest to find out even MORE! We hope you'll WONDER some more on your own about your questions and let us know what you find out...we LOVE to learn new things, too! :-)
Do you know how search engines work? There are three basic stages for a search engine: crawling – where content is discovered; indexing, where it is analysed and stored in huge databases; and retrieval, where a user query fetches a list of relevant pages.