Chords sound great on bass and help you understand harmony as well as the notes that you can use in basslines. Here's a really easy way to think about and memorise seventh chords. Scroll down for the shapes and PDF.
Seventh Chords For Bass Guitar
Related Bass Chord Lessons
These lessons will help you to further understand what bass guitar chords are and how to use them. Whilst they are definitely used less than single notes, they're really useful for composing and increasing your understanding of harmony and how chords fit together.