Shared hosting is the most popular type of web hosting. A shared host will host multiple websites on the same server where they share the space and resources available on that server. Shared hosting is the least expensive web hosting option and typically provides the lowest performance levels in terms of website up time, page load speed, and customer service. However, its affordability makes it very attractive to owners of small websites, and the performance levels are typically acceptable to most small website owners.
No Hosting provider can guarantee 100% availability, although reputable hosting providers have 99% uptime. Check the uptime statistics of a hosting company before you sign up.
Most of the Shared hosting companies don`t offer Dedicated IP, it means you cannot install SSL certificate on your website.
For better security and enhanced performance it is suggested to upgrade to VPS or dedicated server.