Which one below is correct?
- (Something) added a few seconds ago
- (Something) added a few moments ago
- (Something) added a moment ago
They are all correct. If you were to be designing a system that identified that something was added less than a minute ago you might also use:
(Something) added less than a minute ago
Thank you @The photon. I think "Just now" is the answer in my context - want to say something created/happened at a point less than 1 minute ago.
It happened just now! It created just now!
The exact phrase would be:
(Something) added <number of seconds> seconds ago.
i.e. "New item added 34 seconds ago."
Many applications use this alternatively to "less than a minute ago". See Dropbox for example. Synchronization changes will be shown in seconds (under a minute).