Website uptime means time of undisturbed operation of your website, server. At present moment there is no big difference between web hosting services. But it is impossible to provide 100% uptime in other words to provide website and server performance 24 hours per day 365 per year, because there are real people and real technique. Both of them have illness and breakages. So, all statements about 100% web site uptime are false.

There is another aim: to reduce downtime of yourwebsite. For this purpose there is such service as website uptime monitoring.It helps you to watch your website performance round the clock and notices youabout uptime problems. So, you have an opportunity to make actions to reduce downtime.