What is the uptime guarantee of the site ?

Uptime guarantee refers to the amount of time the server is live and serving your web pages. An uptime guarantee of 99% means that the host guarantees that their servers will be up and operational 99% of the time.

It means Over the course of one year, 99% uptime would represent a downtime (the one percent) of around 87 hours in a year or an average of 7 hours per month. An uptime of 99.9% would involve only 8 hours of downtime for the entire year.