Ceramic capacitors are great for filtering out noise above 1KHz. Power spikes and other noise can cause all sorts of weird things to happen in your project so having a few of these should help quite a bit! This specific capacitor is rated at 0.1uF and 50V. Place these next to the VCC pin on all of your ICs to improve stability.
These capacitors have a 0.100? (2.54mm) spacing, meaning these work great with a solderless breadboard or protoboard.
