Cache and Indexing?

What is the Cache and Indexing? would you Please give me Detail with Example

 

Cache:

operator shows you an archived copy of a page indexed by Google. For example, cache:google.com displays the last indexed version of the Google homepage, along with information about the date the cache was created. You can also view a plain-text version of the page. This is useful because it shows how Googlebot sees the page.

Index:

Inclusion in Google's search results is free and easy; you don't even need to submit your site to Google. Google is a fully automated search engine that uses software known as "spiders" to crawl the web on a regular basis and find sites to add to our index. In fact, the vast majority of sites listed in our results aren't manually submitted for inclusion, but found and added automatically when our spiders crawl the web.

 

Above is exact Answer for the indexed and cached

 

Cache - Crawlers based search engines develops program to scan your webpages.

Index - After Crawling, Search engines visit you webpage, then follow links to other pages within a site.

 

Cache means any search engine robots or spiders crawls a specific web page and take the snapshot of that particular page. And after it crawls to that specific webpage, it will update that page details to it's database and that process is called indexing.

 

- Cache is what a search engine makes use of to judge if a page is a good match for a searched query.
- Index refers to getting website listed in the search engine's database index for SERP.

Based on SEO term
1-when search engine bot or crawler come to your page or found any update on site, this process is Cache.
2- After reading the updated element it stores those new elements in Search Engine's database. This restoration process is Indexing