Redirection is pretty much useless nowadays as search engines have put this into their "ignore" and ban section when crawling a page. In the past webmasters would make up a page about something like "stamp collecting". When the user goes to the page, they are then forwarded to a porn page or some scam affiliate page.
There are however the few people that use redirects legitemately, although, one redirect is the same as another. So to avoid confusion, the search engine spider will ignore it completely. This unfortunately can sometimes infuriate webmasters as they "HAVE NOT FOUND MY SITE ON THE SEARCH ENGINES". This blame is usually put on search engines, but usually webmasters or site owners are ignorant to the usage of this tag.
This tag structure is usually in the form:
<meta HTTP-EQUIV="refresh" CONTENT="10; URL=http://www.your page address here.html">
The 10; before the URL in the above code is the amount of seconds before you are redirected. So if you wanted someone to be redirected quickly you could put nothing and leave out the 10;. Click here for an example of an immediate redirection. (to view the source of the page click here)
Javascript redirects are usually in the following form:
<SCRIPT language=javascript>
<!--
location.replace("http://www.anypagehere.com");
-->
</SCRIPT>
I have just added the quick javascript redirect page here. (to view the source of this page click here)