Shards are like the collectibles in Super Time Force that you will find in almost every level of every chapter. Collecting all these Shards will also unlock a secret achievement named Looker, but this is not simple, you have to do some other work to do it.

For now here we have the locations of every single Shard. To reveal the Shard in the current level you're in you have to use the Time Out Ability. So use this ability whenever its ready.