Black Friday is a time when the market becomes much more competitive and many customers start watching prices much more closely. Building a simple crawler to monitor prices is a good way to understand how the competition behaves and identify opportunities for buying or adjusting a business strategy.
The key idea is to automate reading e-commerce pages to track price variations over short periods of time. This can be useful for those who sell, those who buy or anyone wanting to understand market dynamics.
But, as with any automation of data collection, the use needs to be responsible. It is important to respect terms of use, rate limits, robots.txt and legal rules. The text emphasizes that crawlers are not forbidden technology, but a tool that must be used with common sense and ethics.
In short, the article shows that crawlers help monitor prices in a practical way, but always with attention to the limits of data collection and the responsibility of whoever automates the process.