Taxonomy
Create content once but find it throughout your site.
What is Taxonomy?
Taxonomy is the science of classification. A Wikipedia explanation can be found here
But, what does this do for you?
You can create content once and apply it to multiple places. Visitors then find your ocntent throughout your site without you managing the responsibility of creating and maintaining multiple copies. It's a one-to-many relationship beteween content and categories.
Suppose you have copy about coffee cups. You could apply that content to the groups
Dishes,
Coffee and
Souveniers
This grouping could be much more sophisticated with nesting and multiple levels but once you understand one-to-many relationships it's quite easy to create and maintain this on your site.
It becomes incredibly easy to move and apply copy all over your taxonomy driven site.
The hierarchal taxonomy classifies and structures web pages and managed documents into logical groupings based on their content. Using any number of taxonomy trees predefined by CMS administrators, content can be categorized into structured parent-child navigation. It provides the option of tagging one piece of content with many different category associations, the benefit is your ability to repurpose content in many areas of your site. Taxonomy can be used to filter searches, focusing results and providing a very powerful site navigation tool.