FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -These programs, or bots, are most commonly used to create entries for a search engine index. Web crawlers systematically browse webpages to learn what each page on the website is about, so this information can be indexed, updated and retrieved when a user makes a search query.

Detailed explanation-2: -A web crawler, or spider, is a type of bot that is typically operated by search engines like Google and Bing. Their purpose is to index the content of websites all across the Internet so that those websites can appear in search engine results.

Detailed explanation-3: -There are several disadvantages to crawlers: Sometimes, it’s just too much information. It is easy to trick the crawler. Websites have hidden data that can be manipulated to make the page appear like it’s something it’s not.

Detailed explanation-4: -Web crawling is used to collect stock prices data from different platforms for different periods (for example 54 weeks, 24 months e.t.c). The stock prices data collected can be analyzed to discover trends and other behaviors. You can also use the data to create predictive models to predict future stock prices.