Arpeggio is playing the notes in a chord one by one instead of simultaneously.
In a G chord, the notes are G B D.
This arpeggio exercise is in G and helps to make it sound more interesting.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhZFdbotpc1dq8ZDUHjB0y5985OYiGFDtQ_a2CL6HIaaaXYL2jDkqAGpjrgDmaYI-NzzL_zmssc39ULsazjoCEydAB4BMeJ1uQXksqxUjrbHQc99fedvs_5jzDiL3R1Lx-x8HQubA/s400/G_arp.jpg)
Hopefully this can give you some ideas to use arpeggio to create your bassline.
Have fun.