Web scraping

Definition

Web scraping means using software to extract data from web pages. A scraper might read HTML, collect text, follow links, or use browser automation to access information that appears on a page.

Why it matters

Web scraping can be useful for research, testing, or data collection, but it must be used carefully. Websites may have legal, ethical, technical, and performance limits on automated access.

Example in VCA

In VCA, web scraping is best treated as an advanced topic after learners understand HTML, APIs, and responsible data handling.

Another Real World Example

A developer might scrape public product names from their own website to check whether pages are rendering correctly after a deployment.

Common mistakes

Scraping private or restricted data.
Ignoring a website's terms, robots rules, or rate limits.
Using scraping when an official API would be safer.
Building a scraper that breaks whenever the page layout changes.
Sending too many automated requests too quickly.