Crawling is the
essential process where web pages are recognized in search engines
such as Google. Right now, there are millions of web crawlers on the
hunt for web pages with unique and not-so-unique content. The process
is inevitable; every web page or document will be crawled, but
programmers can instruct certain web pages to be exempted or follow
specific instructions when crawling.
To put it simply,
crawling is like following a trail of bait that spans to multiple
directions at some point. Crawlers look for their pick-me-up—in the
case of SEO, related results—and follow the trail to its base. When
it finds another tasty trail in the base, the crawler will follow
that, too, and end up in a new base. The main purpose of the entire
process is to assess and collate website information...