What will I learn to do?
In addition to sections, your site can be organized around keywords. A keyword represents a specific topic that articles (or other site elements) in different sections can have in common.
Your audience can navigate through the site by following keywords instead of sections. Sections have a vertical hierarchy, while keywords are horizontal.
It will look like this when you’re done:

In this lesson, you will learn how to create and configure keywords so that your audience can easily search the stories they are interested in using keywords and find them. Your keyword configuration should also make it easy for editors or administrators to assign keywords to articles.
You will also learn how to create keyword groups, and how to delete and modify keywords as well as groups of keywords.
What are keywords?
In SPIP, keywords are a limited number of specific terms chosen by the administrators. They are organized in groups.
Keywords are different than search terms and have no direct link with the SPIP search engine.
Keywords are assigned to each story by editors and/or administrators.
Each article can be associated with any number of keywords. These keywords display with the article, usually at the end.
The reader can click on any one of the keywords, and will go to a list of other articles associated with that keyword.
Why should I use keywords?
On most sites, readers navigate by finding articles of interest on the home page, and then looking at the other articles within the sections that interest them. Or, they do a search for particular words on topics they want to read about.

Keywords give the SPIP site another kind of navigation, which is independent of sections and the search engine.
This kind of navigation gets around the limitation of the sections hierarchy. Even if an article only appears in one section, the reader can find it through many keyword paths.
So, keyword navigation is much more flexible and interconnected than the hierarchical “tree” structure of sections.
A keyword is more specific to the context of the article than a search term is: if the reader searches for “women” he might get hundreds of articles; but in the keyword system, he would only see the articles that are mainly concerned with women.
That is because the keywords are assigned by an editor or administrator – people who understand the story’s meaning – rather than operating as a mathematical factor for the search engine.
Typical navigation on the public site using keywords:
The reader calls up a story from the home page
The list of keywords is displayed along the bottom
The reader can click on the keywords that interest them
This takes the reader to page of stories using that keyword
The reader can then follow other keywords to other topics and stories
Navigate in the site using keywords
How do I do enable the keywords feature?
First, watch the steps:

You are logged in as an administrator, and you are at the Launch Pad
Click on the main icon for “Configuration”
The Configuration page loads
Click on Site Content tab
Scroll down to the Keywords section

Click the button “Use keywords"
Clik Submit
Enable keywords feature

Now the keywords option will appear under Site Edit