Pragma , no-cache , Expires , .huh?

Pragma , no-cache , Expires

[john1000]

Hello,

I wasnt sure where to post this ,so if it wrong im sorry for that..
seemd like a browser question.

What i would like to know is the defferences between these tags:

<meta http-equiv="Pragma" content="no-cache">
<meta http-equiv="Cache-Control" content="no-cache">
<meta http-equiv="Expires" content="0">

When do you use these?
I mean ,..i do update my site a lot,but is this only effecting the visitor or does it helps me keeping my content in search engines uptodate?

Im not sure what to think about this.
Many may like google a lot but if i use [search.live.com...] and check its cache i see my site like its now.
if i do the same with google i see it uses old stuff...

any feedback on this?

Thank you,

John

[tedster]

Those meta tags do not affect the search engines. They're used to keep the browser from holding onto old data, especially in situations where the user's action changes the content.

[john1000]

ok thanks......