When you come across a Challenge you're interested in, you can save it for later by clicking the Bookmark icon located in the top right corner of the Challenge view. All of your bookmarked Challenges are stored in your “Bookmarks” page under "Bookmarked Challenges", located HERE. Once you complete a bookmarked Challenge or no longer wish to do it, you can click the bookmark icon again to remove it from your "Bookmarked Challenges" list.
When you bookmark a Challenge that has a deadline, you will receive notifications when the deadline is approaching.
Here's a helpful visual aid to show where you can access your Bookmarks:
If you have any questions, please send an email to firstname.lastname@example.org and we will get back to you as soon as possible.