One of the often overlooked advantages of building your eCommerce website using an online website builder is that you'll get all your hosting requirements taken care of as part of the monthly price.
Sometimes though you'll need a vanilla hosting account to store files or perhaps build a blog in Wordpress to support your main site. Over the years I've had my fair share of disasters from a combination of not making my own backups and hosting companies that never tested theirs.
Losing all your data is the worst possible scenario. But it happens. The hosting space is a competitive market, and often corners get cut. I highly recommend EZPZ Hosting I've used them for the past four years.