This article talks about why we need need to back up our websites, what backups do and how to choose a good backup solution.
According to the article a good back up solution has a location that is offsite, automation so you don’t have to remember to do it manually, redundancy so that is creating a back up of your backups and testing to make sure that the solution works.
Source: https://blog.sucuri.net/2018/06/website-backups.html