Having an SSL lets your viewers and clients know that their personal information when entered on your website (debit cards, credit cards, log-ins, etc) will be encrypted when it is sent. Google and all major search engines are now labeling websites hazardous or NOT SECURE that do not have a SSL.
Not backing up your entire website can be disastrous for your entire business. Over 80% of businesses do not back up their entire website. Which leads to technical vulnerabilities such as lost information, viruses, and increases your chances of your website being hacked!