An FAQ (Frequently Asked Questions) page is a key part of a knowledge base because it addresses the most common questions customers have and is useful to customers at all stages of the customer journey. FAQs start with a question and then answer it concisely.
An FAQ page can help users navigate your site. Not only does an FAQ with links to related content provide your user with a deeper experience of your website, it also boosts your internal link-building, which is an important search ranking factor.
An FAQ page improves user experience. No matter how clear and well-organized your website is, users with questions probably have to browse through a few pages looking for the right answer, which can be annoying for a visitor that just wants a quick answer to an easy question.