What is the definition of "Caching " in SEO.
And
is it benificial in any way for websites or not.
please help me to find out the more appropriate answer.
Your asking about CACHE date of website or some thing … ?
Is this question about cached date of the website or any other thing…
The search engine’s stored data about your site. This information can be weeks or months out of date, depending on your crawl rate. When you make SEO changes to your site, it won’t be applied until the site gets re-cached and re-indexed. To see your cache in Google, type in cache: followed by your website.
Thanks to all of them but i’m trying to ask all about caching in SEO…i.e what is the role of caching in SEO for an websites.
what is a “sitesaturation” in SEO
please tell me all about it.
Search Engine generally capture your webpages when crawler come to your site,capture pages displayed in SERP(search engine result pages) when user type keywords in search engine.you can right click the search result you can observed the cached.The cached contain the snapshot of your page and date of crawler come to your page.Cached version of your page don’t change site gets re-cached and re-indexed.
you can also checked your webpage cache type cache:example.com in search engine .
How can be understand Keyword stemming in SEO.
Please help me to find out short and most related answer. 
Hi @SolomonK; welcome to the forums.
As you are asking in terms of SEO, I imagine you’ve already tried searching for definitions of
sitesaturation
and
Keyword stemming
but were unable to find any results?
Seems to me that if these terms were commonly used there would be some information on them somewhere.
So i’m guessing you are looking for more particular information about them but forgot to ask?
Ok…I’ll remember your advise @Mittineague
The role of cache in search engine optimization is very obvious. When you brings some changes in the search engine optimization policy or technique for your website, it helps you to re-cached and re-indexed your website after applying all the changes.
Hi
Cache means, crawler is visiting your website daily and updating its data base with updates occurred on your website, it means your website is being cached frequently.
Caching of website is checked by “cache:website.com”
thanks