About Web Config File in ASP.Net

Question

hi all,

  I want to make my application work faster by using outputcache.i don't  know how to use that can any one explain it clearly by using coding.

I saw coding in some website:

http://dotnet.dzone.com/news/aspnet-caching-improving-perfo

<system.web><caching>
<outputCacheSettings>
<outputCacheProfiles>
<add name="profile" duration="30" enabled="true" varyByParam="pageNumber"/>
</outputCacheProfiles>
</outputCacheSettings>
</caching>
</system.web>


can anyone help me to do this task