When community members view articles, we show related articles to help them find what they’re looking for. This feature was too great to limit to articles, so we shared the love with questions (Beta). The Related Article List and Related Question List components appear by default on the Article Detail page and Question Detail page, respectively. You can customize the component titles and the number of items in the lists in Community Builder.
Related questions are available within 24 hours after the release. To see related questions, your community must have a best answer for at least one question.
Sample Related Articles List (Property Editor and component)
Sample Related Questions List (Property Editor and component)