An “arpeggio” is simply a chord that is played one note at a time, randomly, or in a pattern.. could be fingerpicked, or played using a pick. It’s as simple as that.
Here are some examples of guitar songs written using arpeggios:
These days, arpeggios are pretty popular in music…. in the 90s, not so much. So don’t be afraid to use them, as the main piece of your song, or to accompany a different part, and make it more colorful and interesting!