How are they used?
As far as the utility is concerned, each process has its own applications. Retailers and financial analysts use data mining in their respective industries. Retailers, for example, like to use mining to study the graph of their company's growth and decline to develop more profitable and effective sales methods. Likewise, finance analysts wish to employ mining to explore possible investment prospects and predict the success of their startup.
Web data scraping, on the contrary, is just the extraction of content using bots. It is exclusively used in data-driven digital enterprises to convert the collected data into better forms such as excel. Legitimate use cases of scrapping include search engine bots crawling a site, rating it, and analyzing its content.