These are freshwater Shrimp that are incredibly peaceful and renowned for their algae eating capabilities.
Suitable for both beginners and experienced aquarists as they are very undemanding requiring very little upkeep.
If you watch them you will see that they spend large periods of their day grazing on whatever is in your aquarium; plants, moss, substrate etc.
They are very active throughout the day and night.
The water in the tank must be stabilized before the shrimp is placed in the tank.When they arrive, they will be a little stressed from the shipping and will look white/clear. Give them some time to settle in and color up. 
Special Notes
Because shrimp are sensitive to their environment, there are a few other things to keep in mind. For example, copper, copper based and even some non-copper based fish medication can seriously harm them. Always research whether medication you want to use in your shrimp tank is actually safe or not before using it, as the wrong medication can kill off an entire colony. 
Wash any new plants/decorations before introducing them to the tank.