Over the past decade the World Wide Web internet revolution has made the world as an information center. You can make you of any information from the Internet. However, in some case you are in need of downloading information from web site, and large number of document. And something it is really hard to do for everyone. In such situation web scraping technology really help is save time, money and reduces the manual work.
Web data extraction is the process of extract data from webpage HTML source, compare data, manipulate them and format them in a structured way as required. If you are a programmer you can easily create a web scraping script of your own within few minutes. But nowadays there are many software tools that are available which you can easily scrape required data without any programming knowledge.
For example email extractor tool. With the help of email extractor tool you can easily extract the email addresses of target customer and send those advertisements, notification of product launch and much more.
However, there is more website having scrape rights for their content and protect their content using various techniques like blocking particular ip address that are trying to automate their website, highly protected website etc.