You can bookmark an answer, post, or share by clicking the more options menu (e.g. the "...") at the bottom of the content, then selecting the "Bookmark" option.
On web, you can find bookmarked https://www.quora.com/bookmarks.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
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.