The amount of information to parse is countless just like the list of human activities.
Prices
Comparing prices and purchasing huge numbers of items cheaper and selling them for a higher price is a simple, yet effective way to exploit web-scraping in e-commerce. Even several cents of price difference make such transactions really profitable if you’re purchasing and selling millions of items.
Bets
Betting analysis is also an interesting way to use web-scraping. Web-scrapers are able to analyze betting services, giving you profit if you bet much enough.
Market’s demand and offer
By analyzing customers’ feedback web-scrapers can find gaps in the market’s offer, which you can fill with your own business ideas. For example, you analyze the biggest websites selling kitchenware. The web-scraper’s analysis shows that the market doesn’t offer enough forks. You start selling forks and voila – your business gets successful.
News
Why would you parse news? For millions of reasons actually. You may be a news agency, trying to figure out which articles are the most popular, or a politician, who wants to know what topics he should pay special attention to.
Older web-sites
Most web-scrapers are used to parse someone else’s websites, but you can also use them to parse…your own website. Why would you do that? Well, if you want to update your site or create a new one instead of your outdated web page you have to transfer all the data from an older site to a newer one. Thereby you ought to know that web-scrapers allow you to copy all the relevant information from the older web page and put it to a new one with a different design and architecture.