Crawling, Indexing and Caching

[guitarprince]

Crawling- Google sends its spiders to your website..
Indexing- Google visited your website and has added you to its database..

Caching- Google toook a snapshot of your website when it last visited and stored the data in case your website went down or if there are some any other issues.

[richardmsmith]

Crawling is when google spider visits your sites pages one by one. Indexing is when google will save your sites information into its database and in caching it saves a new web page in the google cache database which is read to be indexed.

[shriti1234]

Crawling is the bot's expedition, HTTP requests fetching raw pages for later parsing, often via libraries like Scrapy or BeautifulSoup.
Indexing compiles these fetches into an inverted index, enabling quick lookups sorted by relevance algorithms. Caching buffers responses in memory or disk, employing LRU eviction for performance, dodging redundant server hits.