Using this LED light bar graph display is easy. First, find a suitable breadboard and plug the display into it. The 20 pins with 0.1' spacing make it simple to connect. For driving it, if it's a multiplexed type, check out the tutorials about matrices for ideas. When it comes to using it, just power it up and watch it show that cool yellow glow. As for maintenance, keep it away from excessive heat and moisture. Don't apply too much force when plugging or unplugging it from the breadboard to avoid damaging the pins. If there's dust on the display, you can gently wipe it with a soft, dry cloth.