You can bookmark topics, answers, posts and shares on Quora. Bookmarked topics will appear on the left-hand side of your Home page, under "Feed". Bookmarked content will appear in your Bookmarks page.
On web, you can find bookmarked content by clicking on your profile image at the top right-hand corner of the site, then selecting "Bookmarks" from the drop-down menu. You may also visit https://www.quora.com/bookmarks.
On the mobile app, you can find them by tapping on your profile icon in the top left-hand corner of the app, then selecting "Bookmarks" from the drop-down menu.