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Crawlers run in Octoparse are determined by the rules configured, and the data extracted is structured data. Octoparse does not understand the web content with advanced algorithms, but it grabs the exact web content to you perfectly.
The rule configured would tell Octoparse: which website is to be open; where is the data you plan to crawl; what kind of data you want, etc.
Octoparse has a visible workflow designer to show how the rule is created. You can configure the rule by simply point and click the element on the web page. Octoparse can scrape multiple pages (pagination), scrape a website behind a login, deal with web pages loaded with AJAX, scrape a website with infinite scrolling, etc.
Check out this article to better understand a task in Octoparse.
If you have any questions, we'd happy to help.