Your domain name is your unique identity. Domain names are used by businesses and individuals who plan on having an online presence. If you want to have a website or even a business email address, you need to have a domain name. This offers you the perfect stepping stone to start promoting yourself online and also protects you if you have a registered business and want to avoid anyone buying your matching domain.
The availability of a website is measured by the percentage of a year in which the website is publicly accessible and reachable via the Internet. This is different from measuring the uptime of a system. Uptime refers to the system itself being online. Uptime does not take into account being able to reach it as in the event of a network outage. A hosting provider's Service Level Agreement (SLA) may include a certain amount of scheduled downtime per year in order to perform maintenance on the systems. This scheduled downtime is often excluded from the SLA timeframe, and needs to be subtracted from the Total Time when availability is calculated. Depending on the wording of an SLA, if the availability of a system drops below that in the signed SLA, a hosting provider often will provide a partial refund for time lost. How downtime is determined changes from provider to provider, therefore reading the SLA is imperative. Not all providers release uptime statistics. Most hosting providers will guarantee at least 99.9% uptime which will allow for 43m of downtime per month, or 8h 45m of downtime per year.
Bluehost does offer an automatic backup system along with daily scheduled backups, albeit these are only included for free with certain hosting plans. However, you can add a backup system to the packages that don’t already include it for just $3 a month, which is a small price to pay for keeping your files safe. That, or you can simply back up your files via FTP as mentioned earlier.