Web scraping means collecting data from websites automatically instead of copying it by hand. For a business it's useful for things like tracking competitor prices, gathering public listings, monitoring availability, or pulling together information scattered across many pages. Done well, it turns hours of manual checking into a report that updates itself.
What it's good at: public, structured information that changes over time and that you'd otherwise check repeatedly — prices, product catalogs, job postings, public directories. If a person could open the page and read the value, a scraper can usually collect it on a schedule and put it into a sheet or dashboard.
The lines to respect: scraping isn't a free-for-all. A site's terms of service may forbid it, personal data carries legal obligations, and hammering a server with too many requests is both rude and likely to get you blocked. The safe posture is to collect only public, non-personal data, at a polite rate, and to stop if a site clearly asks you not to. When money or personal data is involved, check the legal side properly rather than assuming.
The technical reality: scraping is rarely a set-and-forget job. Websites change their layout, add anti-bot measures, or move their data behind logins and JavaScript. A scraper that works today can quietly break next month, so anything important needs monitoring and the occasional repair. The value is real, but it's an ongoing system, not a one-time script.
A better option when it exists: if the source offers an official API, use it instead of scraping. An API is the site giving you the data on purpose — more stable, usually allowed, and far less likely to break. Scraping is the tool for when there is no API and the data is genuinely public.
If you're considering it, start by writing down exactly what data you need, from where, and how often. That single page of requirements decides whether scraping is the right tool, whether an API exists, and how much upkeep it'll really need.