The number of Internet users is increasing steadily, as is the number of active websites. According to Netcraft’s January 2017 Web Server Survey, there are 1,800,047,111 billion websites. i The number of pages on these websites changes continually according to many factors. Google Inside Search estimates that there are more than 130 trillion web pages discovered by Google; about 50 billion of them have been included in Google’s searchable index as of October 2017. ii Do not forget that ...
© Nihad A. Hassan, Rami Hijazi 2018
Nihad A. Hassan and Rami HijaziOpen Source Intelligence Methods and Toolshttps://doi.org/10.1007/978-1-4842-3213-2_44. Search Engine Techniques
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