What is this breadboard?  How do you use it?

You can click on the picture to enlarge it.  The two rows on either side are marked + and -.   The connect top to bottom.   You connect the 3.3V or 5V to the +.   You connect the ground or gnd of the device to the -.  

In the center of the board you have a, b, c, d, e and f, g, h, i, j.   Each row is numbered on this breadboard 1 to 30.  You can buy a larger version of it.  a to e and f to j are connected across each row.  The center separator splits them.