It’s important that you backup your database. The most important thing you can do. However making backups isn’t enough: you need to verify those backups are good.
A humorous short video from Grant Fritchey (b | t) and RedGate on why:
Watch the video
Ideally you verify every backup every day, but that’s not always feasible. At least make sure you’re doing one backup from every database at least once a month.