Correct option is B
A
web crawler (also known as a web spider or bot) is a type of software program that systematically browses websites to collect content. This collected content is then indexed, allowing search engines to provide relevant results to users.
Important Key Points:
1.
Web Crawlers: The primary purpose of web crawlers is to
index web content to ensure search engines like
Google and
Bing can provide
relevant and
up-to-date search results.
2.
Role in Search Engines: They help search engines
discover new pages and update information by following links on websites.
Knowledge Booster:
·
Web Scraper: Used to extract specific information from websites, but unlike web crawlers, it is often for
targeted data collection rather than general indexing.
·
Content Moderator: Human or automated systems used to monitor and manage content on platforms to ensure it adheres to specific guidelines.
·
Data Analyzer: A tool or software used for
analyzing collected data, not for collecting or indexing web pages.
·
Firewall: A
security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules, unrelated to browsing or indexing web content.