The FAQ (Frequently Asked Questions) module allows you to create categories of questions, with answers. This module contains a list of questions (and their answers) frequently asked by visitors.
Only an administrator may enter questions and answers, and by default, the text in neither the question nor the answer is searchable. However, if you provide suitably named categories it should not be difficult for a visitor to find the question they are after.
By default, the FAQ module is not activated.