Search Engines How do search engines work? How do you use a search engine? Search Engines Making sense of results.

How search engines work Search engines use crawlers to find the key information about the think you want to search. Just like spiders crawling for there tea. The computer takes you to the best explained and how many times your key word is used in the text you are trying to find. Crawlers collect a few websites that are then linked to more and more and more till you have a thousand of information. But how does it make the decision for you on what you want to see? The web find the one with the most mention of your word it could be in the title of mentioned a lot in the main text. Or it could look for synonyms we get this by using an algorithm. They rank it to give you the best choose- 1. How many times it is updated. 2. Linked to other web pages 3. Making sure it is not a spam and the information is true. More information http://www.bbc.co.uk/guides/ztbjq6f#zqdfyrd

How do you use a search engine? People tend to use key words for our information you do not even need to ask the question. You only need simple words (do not use and, it …) and punctuation is ignored (/;#?.) Remember that a computer is not a person it is a program ,you need to specific put keep it simple. What is the capital of England? What would you say. Sometimes you only need two words to get your answer. Using speech marks makes gives you only what the words are in them These can change your results AND narrows our search results limits OR is used in the internet in order to broaden your results sometimes not quite what you might want Try and find these out To find the capital of England. To find a picture of the pyramids. To find a science experiment in action. England Fact George Boole created Boolean the AND, OR. He was born on November 1815 and died 8 December 1864. he was a mathsmatision and invented algebra.

Making sense of results. To make sure you have got a good website- Look at the ending domain (is it reliable) What does the URL (Uniform Resource Locater) think about the website When was it written Is it advertising Who is the author or who owns the site. If something has top ranking it might not be because it is really popular they could pay for their website to be put at the top. Next

Domain Names .gov .net .com /kids .edu .ac.uk .org .co.uk .mil GOVERNMENT - it is illegal to make a website ending with .gov. and you can rely on websites ending in .gov because they are official. INTERNET PROVIDER – people like BT and other groups that provide internet. COMPANY - .com is world wide and can be used for supermarkets like Tesco and Sainsbury's. EDUCATION - /kids tends to be an extended domain and is for kids and has appropriate information on it. HIGHER EDUCATION – basically like /kids but for people in high school and university's. ACADEMIC – it is just the same as .edu each school, university can choose what they want it to end in. ORGANISATION – a charity of fundraising groups you can really on these websites. BRITISH COMPANY – this is not world wide and the ending changes depending on witch country it is MILARTY – it is illegal to have a website ending with this it is for the use of only military groups.