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-rw-r--r--guides/source/caching_with_rails.md16
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diff --git a/guides/source/caching_with_rails.md b/guides/source/caching_with_rails.md
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Caching with Rails: An Overview
===============================
-This guide is an introduction to speeding up your Rails app with caching.
+This guide is an introduction to speeding up your Rails application with caching.
+
+Caching means to store content generated during the request-response cycle and
+to reuse it when responding to similar requests.
+
+Caching is often the most effective way to boost an application's performance.
+Through caching, web sites running on a single server with a single database
+can sustain a load of thousands of concurrent users.
+
+Rails provides a set of caching features out of the box. This guide will teach
+you the scope and purpose of each one of them. Master these techniques and your
+Rails applications can serve millions of views without exorbitant response times
+or server bills.
After reading this guide, you will know:
-* Page and action caching.
* Fragment and Russian doll caching.
+* How to manage the caching dependencies.
* Alternative cache stores.
* Conditional GET support.