The latest iFAQ version already comes with a iFAQ content plugin built-in, which is automatically installed and enabled.

You should see a plugin button bellow your WYSIWYG Editor* like this:

moofaq-plugin-button

Click on it and you will see this the iFAQ addition form:

moofaq-plugin-form

You can choose the view (search, category or multiple category). If you choose a Search view you are also going to have to add a iFAQ → Search menu item type;

Syntax

When you click on the Add faq button you should see a line like these:

{ifaq  view=|category| id=|31|  showtitle=|0|  showdesc=|0|  }
{ifaq  view=|categories| id=|3|  showtitle=|0|  showdesc=|0|  }
{ifaq  view=|search|  search=|FAQ|  search_type=|keywords|  searchphrase=|all|  title=|Relevant FAQ's|  showdesc=|0|  }

If you are using MooFAQ just change ifaq for moofaq in the plugin syntax.

If you look in your content from the front-end you should see a FAQ in there;

 

* The plugin button is not compatible with JCE, however you can still use iFAQ plugin by inserting the Syntex directly in the content;