Definition - What does Web Scraping mean?
Web scraping is a term for various methods used to collect information from across the Internet. Generally, this is done with software that simulates human Web surfing to collect specified bits of information from different websites. Those who use web scraping programs may be looking to collect certain data to sell to other users, or to to use for promotional purposes on a website.
Web scraping is also called Web data extraction, screen scraping or Web harvesting.
Techopedia explains Web Scraping
Web scraping is essentially a form of data mining. Items like weather reports, auction details, market pricing, or any other list of collected data can be sought in Web scraping efforts.