Web Scraping is very well known for extracting data from the web automatically. For me, the best example of web scraping is goggle search. Why? Its because every time you post to your blog later on you will find it in the Google search it means that goggle indexes your blog post and its getting crawled every now and then every time you update your post. Web scraping is most likely a human automation system, which act as human browsing software without any human interaction.